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Finding the Fourth Proportional to 129,688.80, 194,533.20 and 36,194.40

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Solution

The fourth proportional to 129,688.80, 194,533.20 and 36,194.40 is: 54,291.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,688.80 : 194,533.20 = 36,194.40 : x
  2. Step 2: Convert to fraction form
    129,688.80/194,533.20 = 36,194.40/x
  3. Step 3: Cross multiply
    129,688.80x = 194,533.20 × 36,194.40
  4. Step 4: Simplify right side
    129,688.80x = 7,041,012,454.08
  5. Step 5: Solve for x
    x = 7,041,012,454.08/129,688.80
  6. Step 6: Final answer
    x = 54,291.60

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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.