Home / 156,938.80-235,203.40-72,689.20

Finding the Fourth Proportional to 156,938.80, 235,203.40 and 72,689.20

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Solution

The fourth proportional to 156,938.80, 235,203.40 and 72,689.20 is: 108,938.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,938.80 : 235,203.40 = 72,689.20 : x
  2. Step 2: Convert to fraction form
    156,938.80/235,203.40 = 72,689.20/x
  3. Step 3: Cross multiply
    156,938.80x = 235,203.40 × 72,689.20
  4. Step 4: Simplify right side
    156,938.80x = 17,096,746,983.28
  5. Step 5: Solve for x
    x = 17,096,746,983.28/156,938.80
  6. Step 6: Final answer
    x = 108,938.94

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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.