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Finding the Fourth Proportional to 125,349.78, 172,981.78 and 67,988.93

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Solution

The fourth proportional to 125,349.78, 172,981.78 and 67,988.93 is: 93,824.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,349.78 : 172,981.78 = 67,988.93 : x
  2. Step 2: Convert to fraction form
    125,349.78/172,981.78 = 67,988.93/x
  3. Step 3: Cross multiply
    125,349.78x = 172,981.78 × 67,988.93
  4. Step 4: Simplify right side
    125,349.78x = 11,760,845,096.81
  5. Step 5: Solve for x
    x = 11,760,845,096.81/125,349.78
  6. Step 6: Final answer
    x = 93,824.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.