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Finding the Fourth Proportional to 127,776.64, 191,699.52 and 72,411.52

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Solution

The fourth proportional to 127,776.64, 191,699.52 and 72,411.52 is: 108,636.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,776.64 : 191,699.52 = 72,411.52 : x
  2. Step 2: Convert to fraction form
    127,776.64/191,699.52 = 72,411.52/x
  3. Step 3: Cross multiply
    127,776.64x = 191,699.52 × 72,411.52
  4. Step 4: Simplify right side
    127,776.64x = 13,881,253,626.47
  5. Step 5: Solve for x
    x = 13,881,253,626.47/127,776.64
  6. Step 6: Final answer
    x = 108,636.87

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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.