Home / 156,909.80-216,585.06-100,321.40

Finding the Fourth Proportional to 156,909.80, 216,585.06 and 100,321.40

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Solution

The fourth proportional to 156,909.80, 216,585.06 and 100,321.40 is: 138,475.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,909.80 : 216,585.06 = 100,321.40 : x
  2. Step 2: Convert to fraction form
    156,909.80/216,585.06 = 100,321.40/x
  3. Step 3: Cross multiply
    156,909.80x = 216,585.06 × 100,321.40
  4. Step 4: Simplify right side
    156,909.80x = 21,728,116,438.28
  5. Step 5: Solve for x
    x = 21,728,116,438.28/156,909.80
  6. Step 6: Final answer
    x = 138,475.20

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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.