Home / 142,239,939.20-213,359,908.80-139,972,457.60

Finding the Fourth Proportional to 142,239,939.20, 213,359,908.80 and 139,972,457.60

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Solution

The fourth proportional to 142,239,939.20, 213,359,908.80 and 139,972,457.60 is: 209,958,686.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,239,939.20 : 213,359,908.80 = 139,972,457.60 : x
  2. Step 2: Convert to fraction form
    142,239,939.20/213,359,908.80 = 139,972,457.60/x
  3. Step 3: Cross multiply
    142,239,939.20x = 213,359,908.80 × 139,972,457.60
  4. Step 4: Simplify right side
    142,239,939.20x = 29,864,510,788,047,868
  5. Step 5: Solve for x
    x = 29,864,510,788,047,868/142,239,939.20
  6. Step 6: Final answer
    x = 209,958,686.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.