Home / 102,995.12-142,020.86-89,446.80

Finding the Fourth Proportional to 102,995.12, 142,020.86 and 89,446.80

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Solution

The fourth proportional to 102,995.12, 142,020.86 and 89,446.80 is: 123,338.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,995.12 : 142,020.86 = 89,446.80 : x
  2. Step 2: Convert to fraction form
    102,995.12/142,020.86 = 89,446.80/x
  3. Step 3: Cross multiply
    102,995.12x = 142,020.86 × 89,446.80
  4. Step 4: Simplify right side
    102,995.12x = 12,703,311,460.25
  5. Step 5: Solve for x
    x = 12,703,311,460.25/102,995.12
  6. Step 6: Final answer
    x = 123,338.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.