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Finding the Fourth Proportional to 127,308.93, 190,962.18 and 77,402.79

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Solution

The fourth proportional to 127,308.93, 190,962.18 and 77,402.79 is: 116,103.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,308.93 : 190,962.18 = 77,402.79 : x
  2. Step 2: Convert to fraction form
    127,308.93/190,962.18 = 77,402.79/x
  3. Step 3: Cross multiply
    127,308.93x = 190,962.18 × 77,402.79
  4. Step 4: Simplify right side
    127,308.93x = 14,781,005,516.48
  5. Step 5: Solve for x
    x = 14,781,005,516.48/127,308.93
  6. Step 6: Final answer
    x = 116,103.45

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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.