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Finding the Fourth Proportional to 78,755,718.80, 118,098,148.80 and 30,217,440.80

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Solution

The fourth proportional to 78,755,718.80, 118,098,148.80 and 30,217,440.80 is: 45,312,567.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,755,718.80 : 118,098,148.80 = 30,217,440.80 : x
  2. Step 2: Convert to fraction form
    78,755,718.80/118,098,148.80 = 30,217,440.80/x
  3. Step 3: Cross multiply
    78,755,718.80x = 118,098,148.80 × 30,217,440.80
  4. Step 4: Simplify right side
    78,755,718.80x = 3,568,623,819,953,591
  5. Step 5: Solve for x
    x = 3,568,623,819,953,591/78,755,718.80
  6. Step 6: Final answer
    x = 45,312,567.45

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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.