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Finding the Fourth Proportional to 86,543.40, 129,832.65 and 49,121.40

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Solution

The fourth proportional to 86,543.40, 129,832.65 and 49,121.40 is: 73,692.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,543.40 : 129,832.65 = 49,121.40 : x
  2. Step 2: Convert to fraction form
    86,543.40/129,832.65 = 49,121.40/x
  3. Step 3: Cross multiply
    86,543.40x = 129,832.65 × 49,121.40
  4. Step 4: Simplify right side
    86,543.40x = 6,377,561,533.71
  5. Step 5: Solve for x
    x = 6,377,561,533.71/86,543.40
  6. Step 6: Final answer
    x = 73,692.06

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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.