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Finding the Fourth Proportional to 98,115.70, 147,173.55 and 78,432.70

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Solution

The fourth proportional to 98,115.70, 147,173.55 and 78,432.70 is: 117,649.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,115.70 : 147,173.55 = 78,432.70 : x
  2. Step 2: Convert to fraction form
    98,115.70/147,173.55 = 78,432.70/x
  3. Step 3: Cross multiply
    98,115.70x = 147,173.55 × 78,432.70
  4. Step 4: Simplify right side
    98,115.70x = 11,543,218,895.09
  5. Step 5: Solve for x
    x = 11,543,218,895.09/98,115.70
  6. Step 6: Final answer
    x = 117,649.05

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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.