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Finding the Fourth Proportional to 66,483.60, 99,691.20 and 19,730.40

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Solution

The fourth proportional to 66,483.60, 99,691.20 and 19,730.40 is: 29,585.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,483.60 : 99,691.20 = 19,730.40 : x
  2. Step 2: Convert to fraction form
    66,483.60/99,691.20 = 19,730.40/x
  3. Step 3: Cross multiply
    66,483.60x = 99,691.20 × 19,730.40
  4. Step 4: Simplify right side
    66,483.60x = 1,966,947,252.48
  5. Step 5: Solve for x
    x = 1,966,947,252.48/66,483.60
  6. Step 6: Final answer
    x = 29,585.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.