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Finding the Fourth Proportional to 100,483.76, 138,686.82 and 66,492.92

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Solution

The fourth proportional to 100,483.76, 138,686.82 and 66,492.92 is: 91,772.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,483.76 : 138,686.82 = 66,492.92 : x
  2. Step 2: Convert to fraction form
    100,483.76/138,686.82 = 66,492.92/x
  3. Step 3: Cross multiply
    100,483.76x = 138,686.82 × 66,492.92
  4. Step 4: Simplify right side
    100,483.76x = 9,221,691,627.31
  5. Step 5: Solve for x
    x = 9,221,691,627.31/100,483.76
  6. Step 6: Final answer
    x = 91,772.96

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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.