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Finding the Fourth Proportional to 100,330.90, 138,437.15 and 59,487.48

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Solution

The fourth proportional to 100,330.90, 138,437.15 and 59,487.48 is: 82,081.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,330.90 : 138,437.15 = 59,487.48 : x
  2. Step 2: Convert to fraction form
    100,330.90/138,437.15 = 59,487.48/x
  3. Step 3: Cross multiply
    100,330.90x = 138,437.15 × 59,487.48
  4. Step 4: Simplify right side
    100,330.90x = 8,235,276,894.44
  5. Step 5: Solve for x
    x = 8,235,276,894.44/100,330.90
  6. Step 6: Final answer
    x = 82,081.16

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1.5x scale

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.