Home / 156,931.20-216,543.84-100,302.40

Finding the Fourth Proportional to 156,931.20, 216,543.84 and 100,302.40

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Solution

The fourth proportional to 156,931.20, 216,543.84 and 100,302.40 is: 138,403.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,931.20 : 216,543.84 = 100,302.40 : x
  2. Step 2: Convert to fraction form
    156,931.20/216,543.84 = 100,302.40/x
  3. Step 3: Cross multiply
    156,931.20x = 216,543.84 × 100,302.40
  4. Step 4: Simplify right side
    156,931.20x = 21,719,866,857.22
  5. Step 5: Solve for x
    x = 21,719,866,857.22/156,931.20
  6. Step 6: Final answer
    x = 138,403.75

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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.