Home / 85,803,430.60-128,705,145.90-45,492,646.60

Finding the Fourth Proportional to 85,803,430.60, 128,705,145.90 and 45,492,646.60

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Solution

The fourth proportional to 85,803,430.60, 128,705,145.90 and 45,492,646.60 is: 68,238,969.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,803,430.60 : 128,705,145.90 = 45,492,646.60 : x
  2. Step 2: Convert to fraction form
    85,803,430.60/128,705,145.90 = 45,492,646.60/x
  3. Step 3: Cross multiply
    85,803,430.60x = 128,705,145.90 × 45,492,646.60
  4. Step 4: Simplify right side
    85,803,430.60x = 5,855,137,718,030,139
  5. Step 5: Solve for x
    x = 5,855,137,718,030,139/85,803,430.60
  6. Step 6: Final answer
    x = 68,238,969.90

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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.