Home / 113,742.10-170,613.15-78,312.70

Finding the Fourth Proportional to 113,742.10, 170,613.15 and 78,312.70

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Solution

The fourth proportional to 113,742.10, 170,613.15 and 78,312.70 is: 117,469.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,742.10 : 170,613.15 = 78,312.70 : x
  2. Step 2: Convert to fraction form
    113,742.10/170,613.15 = 78,312.70/x
  3. Step 3: Cross multiply
    113,742.10x = 170,613.15 × 78,312.70
  4. Step 4: Simplify right side
    113,742.10x = 13,361,176,432.01
  5. Step 5: Solve for x
    x = 13,361,176,432.01/113,742.10
  6. Step 6: Final answer
    x = 117,469.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.