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Finding the Fourth Proportional to 71,980.18, 99,339.66 and 53,799.28

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Solution

The fourth proportional to 71,980.18, 99,339.66 and 53,799.28 is: 74,248.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,980.18 : 99,339.66 = 53,799.28 : x
  2. Step 2: Convert to fraction form
    71,980.18/99,339.66 = 53,799.28/x
  3. Step 3: Cross multiply
    71,980.18x = 99,339.66 × 53,799.28
  4. Step 4: Simplify right side
    71,980.18x = 5,344,402,183.44
  5. Step 5: Solve for x
    x = 5,344,402,183.44/71,980.18
  6. Step 6: Final answer
    x = 74,248.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.