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Finding the Fourth Proportional to 113,502.80, 170,254.20 and 99,678.80

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Solution

The fourth proportional to 113,502.80, 170,254.20 and 99,678.80 is: 149,518.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,502.80 : 170,254.20 = 99,678.80 : x
  2. Step 2: Convert to fraction form
    113,502.80/170,254.20 = 99,678.80/x
  3. Step 3: Cross multiply
    113,502.80x = 170,254.20 × 99,678.80
  4. Step 4: Simplify right side
    113,502.80x = 16,970,734,350.96
  5. Step 5: Solve for x
    x = 16,970,734,350.96/113,502.80
  6. Step 6: Final answer
    x = 149,518.20

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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.