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Finding the Fourth Proportional to 103,000.80, 142,129.35 and 57,672.48

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Solution

The fourth proportional to 103,000.80, 142,129.35 and 57,672.48 is: 79,581.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,000.80 : 142,129.35 = 57,672.48 : x
  2. Step 2: Convert to fraction form
    103,000.80/142,129.35 = 57,672.48/x
  3. Step 3: Cross multiply
    103,000.80x = 142,129.35 × 57,672.48
  4. Step 4: Simplify right side
    103,000.80x = 8,196,952,095.29
  5. Step 5: Solve for x
    x = 8,196,952,095.29/103,000.80
  6. Step 6: Final answer
    x = 79,581.44

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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.