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Finding the Fourth Proportional to 111,572.78, 153,948.76 and 66,264.96

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Solution

The fourth proportional to 111,572.78, 153,948.76 and 66,264.96 is: 91,432.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,572.78 : 153,948.76 = 66,264.96 : x
  2. Step 2: Convert to fraction form
    111,572.78/153,948.76 = 66,264.96/x
  3. Step 3: Cross multiply
    111,572.78x = 153,948.76 × 66,264.96
  4. Step 4: Simplify right side
    111,572.78x = 10,201,408,423.45
  5. Step 5: Solve for x
    x = 10,201,408,423.45/111,572.78
  6. Step 6: Final answer
    x = 91,432.77

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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.