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Finding the Fourth Proportional to 191,569.13, 287,353.77 and 79,125.78

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Solution

The fourth proportional to 191,569.13, 287,353.77 and 79,125.78 is: 118,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,569.13 : 287,353.77 = 79,125.78 : x
  2. Step 2: Convert to fraction form
    191,569.13/287,353.77 = 79,125.78/x
  3. Step 3: Cross multiply
    191,569.13x = 287,353.77 × 79,125.78
  4. Step 4: Simplify right side
    191,569.13x = 22,737,091,187.19
  5. Step 5: Solve for x
    x = 22,737,091,187.19/191,569.13
  6. Step 6: Final answer
    x = 118,688.70

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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.