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Finding the Fourth Proportional to 292,126.50, 403,134.57 and 157,990.50

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Solution

The fourth proportional to 292,126.50, 403,134.57 and 157,990.50 is: 218,026.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,126.50 : 403,134.57 = 157,990.50 : x
  2. Step 2: Convert to fraction form
    292,126.50/403,134.57 = 157,990.50/x
  3. Step 3: Cross multiply
    292,126.50x = 403,134.57 × 157,990.50
  4. Step 4: Simplify right side
    292,126.50x = 63,691,432,281.59
  5. Step 5: Solve for x
    x = 63,691,432,281.59/292,126.50
  6. Step 6: Final answer
    x = 218,026.89

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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.