Home / 156,941.20-216,557.64-100,312.40

Finding the Fourth Proportional to 156,941.20, 216,557.64 and 100,312.40

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Solution

The fourth proportional to 156,941.20, 216,557.64 and 100,312.40 is: 138,417.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,941.20 : 216,557.64 = 100,312.40 : x
  2. Step 2: Convert to fraction form
    156,941.20/216,557.64 = 100,312.40/x
  3. Step 3: Cross multiply
    156,941.20x = 216,557.64 × 100,312.40
  4. Step 4: Simplify right side
    156,941.20x = 21,723,416,606.74
  5. Step 5: Solve for x
    x = 21,723,416,606.74/156,941.20
  6. Step 6: Final answer
    x = 138,417.55

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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.