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Finding the Fourth Proportional to 287,607,696.48, 431,348,923.86 and 77,513,478.87

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Solution

The fourth proportional to 287,607,696.48, 431,348,923.86 and 77,513,478.87 is: 116,253,341.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,607,696.48 : 431,348,923.86 = 77,513,478.87 : x
  2. Step 2: Convert to fraction form
    287,607,696.48/431,348,923.86 = 77,513,478.87/x
  3. Step 3: Cross multiply
    287,607,696.48x = 431,348,923.86 × 77,513,478.87
  4. Step 4: Simplify right side
    287,607,696.48x = 33,435,355,695,219,352
  5. Step 5: Solve for x
    x = 33,435,355,695,219,352/287,607,696.48
  6. Step 6: Final answer
    x = 116,253,341.29

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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.