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Finding the Fourth Proportional to 129,087.70, 193,631.55 and 40,368.40

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Solution

The fourth proportional to 129,087.70, 193,631.55 and 40,368.40 is: 60,552.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,087.70 : 193,631.55 = 40,368.40 : x
  2. Step 2: Convert to fraction form
    129,087.70/193,631.55 = 40,368.40/x
  3. Step 3: Cross multiply
    129,087.70x = 193,631.55 × 40,368.40
  4. Step 4: Simplify right side
    129,087.70x = 7,816,595,863.02
  5. Step 5: Solve for x
    x = 7,816,595,863.02/129,087.70
  6. Step 6: Final answer
    x = 60,552.60

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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.