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Finding the Fourth Proportional to 72,572.32, 108,862.26 and 19,980.64

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Solution

The fourth proportional to 72,572.32, 108,862.26 and 19,980.64 is: 29,972.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,572.32 : 108,862.26 = 19,980.64 : x
  2. Step 2: Convert to fraction form
    72,572.32/108,862.26 = 19,980.64/x
  3. Step 3: Cross multiply
    72,572.32x = 108,862.26 × 19,980.64
  4. Step 4: Simplify right side
    72,572.32x = 2,175,137,626.65
  5. Step 5: Solve for x
    x = 2,175,137,626.65/72,572.32
  6. Step 6: Final answer
    x = 29,972.00

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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.