Home / 103,516.80-155,275.20-87,770.40

Finding the Fourth Proportional to 103,516.80, 155,275.20 and 87,770.40

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Solution

The fourth proportional to 103,516.80, 155,275.20 and 87,770.40 is: 131,655.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,516.80 : 155,275.20 = 87,770.40 : x
  2. Step 2: Convert to fraction form
    103,516.80/155,275.20 = 87,770.40/x
  3. Step 3: Cross multiply
    103,516.80x = 155,275.20 × 87,770.40
  4. Step 4: Simplify right side
    103,516.80x = 13,628,566,414.08
  5. Step 5: Solve for x
    x = 13,628,566,414.08/103,516.80
  6. Step 6: Final answer
    x = 131,655.60

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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.