Home / 72,444.28-99,971.30-40,178.76

Finding the Fourth Proportional to 72,444.28, 99,971.30 and 40,178.76

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Solution

The fourth proportional to 72,444.28, 99,971.30 and 40,178.76 is: 55,445.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,444.28 : 99,971.30 = 40,178.76 : x
  2. Step 2: Convert to fraction form
    72,444.28/99,971.30 = 40,178.76/x
  3. Step 3: Cross multiply
    72,444.28x = 99,971.30 × 40,178.76
  4. Step 4: Simplify right side
    72,444.28x = 4,016,722,869.59
  5. Step 5: Solve for x
    x = 4,016,722,869.59/72,444.28
  6. Step 6: Final answer
    x = 55,445.69

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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.