Home / 112,407.64-155,194.86-72,138.76

Finding the Fourth Proportional to 112,407.64, 155,194.86 and 72,138.76

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Solution

The fourth proportional to 112,407.64, 155,194.86 and 72,138.76 is: 99,597.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,407.64 : 155,194.86 = 72,138.76 : x
  2. Step 2: Convert to fraction form
    112,407.64/155,194.86 = 72,138.76/x
  3. Step 3: Cross multiply
    112,407.64x = 155,194.86 × 72,138.76
  4. Step 4: Simplify right side
    112,407.64x = 11,195,564,758.77
  5. Step 5: Solve for x
    x = 11,195,564,758.77/112,407.64
  6. Step 6: Final answer
    x = 99,597.90

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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.