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Finding the Fourth Proportional to 72,298.72, 108,437.10 and 19,712.32

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Solution

The fourth proportional to 72,298.72, 108,437.10 and 19,712.32 is: 29,565.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,298.72 : 108,437.10 = 19,712.32 : x
  2. Step 2: Convert to fraction form
    72,298.72/108,437.10 = 19,712.32/x
  3. Step 3: Cross multiply
    72,298.72x = 108,437.10 × 19,712.32
  4. Step 4: Simplify right side
    72,298.72x = 2,137,546,815.07
  5. Step 5: Solve for x
    x = 2,137,546,815.07/72,298.72
  6. Step 6: Final answer
    x = 29,565.49

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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.