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Finding the Fourth Proportional to 71,646.80, 107,470.20 and 19,061.60

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Solution

The fourth proportional to 71,646.80, 107,470.20 and 19,061.60 is: 28,592.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,646.80 : 107,470.20 = 19,061.60 : x
  2. Step 2: Convert to fraction form
    71,646.80/107,470.20 = 19,061.60/x
  3. Step 3: Cross multiply
    71,646.80x = 107,470.20 × 19,061.60
  4. Step 4: Simplify right side
    71,646.80x = 2,048,553,964.32
  5. Step 5: Solve for x
    x = 2,048,553,964.32/71,646.80
  6. Step 6: Final answer
    x = 28,592.40

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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.