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Finding the Fourth Proportional to 210,888,918.54, 316,354,168.44 and 72,696,332.61

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Solution

The fourth proportional to 210,888,918.54, 316,354,168.44 and 72,696,332.61 is: 109,051,665.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,888,918.54 : 316,354,168.44 = 72,696,332.61 : x
  2. Step 2: Convert to fraction form
    210,888,918.54/316,354,168.44 = 72,696,332.61/x
  3. Step 3: Cross multiply
    210,888,918.54x = 316,354,168.44 × 72,696,332.61
  4. Step 4: Simplify right side
    210,888,918.54x = 22,997,787,851,474,204
  5. Step 5: Solve for x
    x = 22,997,787,851,474,204/210,888,918.54
  6. Step 6: Final answer
    x = 109,051,665.73

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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.