Home / 85,643,839.12-128,445,189.16-39,541,412.88

Finding the Fourth Proportional to 85,643,839.12, 128,445,189.16 and 39,541,412.88

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Solution

The fourth proportional to 85,643,839.12, 128,445,189.16 and 39,541,412.88 is: 59,302,622.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,643,839.12 : 128,445,189.16 = 39,541,412.88 : x
  2. Step 2: Convert to fraction form
    85,643,839.12/128,445,189.16 = 39,541,412.88/x
  3. Step 3: Cross multiply
    85,643,839.12x = 128,445,189.16 × 39,541,412.88
  4. Step 4: Simplify right side
    85,643,839.12x = 5,078,904,257,025,261
  5. Step 5: Solve for x
    x = 5,078,904,257,025,261/85,643,839.12
  6. Step 6: Final answer
    x = 59,302,622.46

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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.