Home / 127,931.20-191,637.60-72,462.40

Finding the Fourth Proportional to 127,931.20, 191,637.60 and 72,462.40

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Solution

The fourth proportional to 127,931.20, 191,637.60 and 72,462.40 is: 108,546.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,931.20 : 191,637.60 = 72,462.40 : x
  2. Step 2: Convert to fraction form
    127,931.20/191,637.60 = 72,462.40/x
  3. Step 3: Cross multiply
    127,931.20x = 191,637.60 × 72,462.40
  4. Step 4: Simplify right side
    127,931.20x = 13,886,520,426.24
  5. Step 5: Solve for x
    x = 13,886,520,426.24/127,931.20
  6. Step 6: Final answer
    x = 108,546.78

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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.