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Finding the Fourth Proportional to 81,980.10, 122,970.17 and 63,287.42

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Solution

The fourth proportional to 81,980.10, 122,970.17 and 63,287.42 is: 94,931.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,980.10 : 122,970.17 = 63,287.42 : x
  2. Step 2: Convert to fraction form
    81,980.10/122,970.17 = 63,287.42/x
  3. Step 3: Cross multiply
    81,980.10x = 122,970.17 × 63,287.42
  4. Step 4: Simplify right side
    81,980.10x = 7,782,465,261.91
  5. Step 5: Solve for x
    x = 7,782,465,261.91/81,980.10
  6. Step 6: Final answer
    x = 94,931.15

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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.