Home / 72,470.40-108,705.60-47,587.20

Finding the Fourth Proportional to 72,470.40, 108,705.60 and 47,587.20

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Solution

The fourth proportional to 72,470.40, 108,705.60 and 47,587.20 is: 71,380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,470.40 : 108,705.60 = 47,587.20 : x
  2. Step 2: Convert to fraction form
    72,470.40/108,705.60 = 47,587.20/x
  3. Step 3: Cross multiply
    72,470.40x = 108,705.60 × 47,587.20
  4. Step 4: Simplify right side
    72,470.40x = 5,172,995,128.32
  5. Step 5: Solve for x
    x = 5,172,995,128.32/72,470.40
  6. Step 6: Final answer
    x = 71,380.80

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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.