Home / 142,431.60-213,647.40-139,666.80

Finding the Fourth Proportional to 142,431.60, 213,647.40 and 139,666.80

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Solution

The fourth proportional to 142,431.60, 213,647.40 and 139,666.80 is: 209,500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,431.60 : 213,647.40 = 139,666.80 : x
  2. Step 2: Convert to fraction form
    142,431.60/213,647.40 = 139,666.80/x
  3. Step 3: Cross multiply
    142,431.60x = 213,647.40 × 139,666.80
  4. Step 4: Simplify right side
    142,431.60x = 29,839,448,686.32
  5. Step 5: Solve for x
    x = 29,839,448,686.32/142,431.60
  6. Step 6: Final answer
    x = 209,500.20

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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.