Home / 72,159.90-99,581.79-40,330.86

Finding the Fourth Proportional to 72,159.90, 99,581.79 and 40,330.86

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Solution

The fourth proportional to 72,159.90, 99,581.79 and 40,330.86 is: 55,657.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,159.90 : 99,581.79 = 40,330.86 : x
  2. Step 2: Convert to fraction form
    72,159.90/99,581.79 = 40,330.86/x
  3. Step 3: Cross multiply
    72,159.90x = 99,581.79 × 40,330.86
  4. Step 4: Simplify right side
    72,159.90x = 4,016,219,231.04
  5. Step 5: Solve for x
    x = 4,016,219,231.04/72,159.90
  6. Step 6: Final answer
    x = 55,657.22

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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.