Home / 112,690.20-155,512.80-61,703.40

Finding the Fourth Proportional to 112,690.20, 155,512.80 and 61,703.40

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Solution

The fourth proportional to 112,690.20, 155,512.80 and 61,703.40 is: 85,150.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,690.20 : 155,512.80 = 61,703.40 : x
  2. Step 2: Convert to fraction form
    112,690.20/155,512.80 = 61,703.40/x
  3. Step 3: Cross multiply
    112,690.20x = 155,512.80 × 61,703.40
  4. Step 4: Simplify right side
    112,690.20x = 9,595,668,503.52
  5. Step 5: Solve for x
    x = 9,595,668,503.52/112,690.20
  6. Step 6: Final answer
    x = 85,150.87

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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.