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Finding the Fourth Proportional to 147,720.69, 203,830.52 and 87,282.93

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Solution

The fourth proportional to 147,720.69, 203,830.52 and 87,282.93 is: 120,436.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,720.69 : 203,830.52 = 87,282.93 : x
  2. Step 2: Convert to fraction form
    147,720.69/203,830.52 = 87,282.93/x
  3. Step 3: Cross multiply
    147,720.69x = 203,830.52 × 87,282.93
  4. Step 4: Simplify right side
    147,720.69x = 17,790,924,572.61
  5. Step 5: Solve for x
    x = 17,790,924,572.61/147,720.69
  6. Step 6: Final answer
    x = 120,436.24

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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.