Home / 156,988.80-235,278.40-72,739.20

Finding the Fourth Proportional to 156,988.80, 235,278.40 and 72,739.20

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Solution

The fourth proportional to 156,988.80, 235,278.40 and 72,739.20 is: 109,013.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,988.80 : 235,278.40 = 72,739.20 : x
  2. Step 2: Convert to fraction form
    156,988.80/235,278.40 = 72,739.20/x
  3. Step 3: Cross multiply
    156,988.80x = 235,278.40 × 72,739.20
  4. Step 4: Simplify right side
    156,988.80x = 17,113,962,593.28
  5. Step 5: Solve for x
    x = 17,113,962,593.28/156,988.80
  6. Step 6: Final answer
    x = 109,013.91

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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.