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Finding the Fourth Proportional to 84,602,879.72, 126,904,757.48 and 38,512,515.88

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Solution

The fourth proportional to 84,602,879.72, 126,904,757.48 and 38,512,515.88 is: 57,768,973.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,602,879.72 : 126,904,757.48 = 38,512,515.88 : x
  2. Step 2: Convert to fraction form
    84,602,879.72/126,904,757.48 = 38,512,515.88/x
  3. Step 3: Cross multiply
    84,602,879.72x = 126,904,757.48 × 38,512,515.88
  4. Step 4: Simplify right side
    84,602,879.72x = 4,887,421,487,696,049
  5. Step 5: Solve for x
    x = 4,887,421,487,696,049/84,602,879.72
  6. Step 6: Final answer
    x = 57,768,973.16

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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.