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Finding the Fourth Proportional to 105,619.92, 145,700.97 and 71,616.90

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Solution

The fourth proportional to 105,619.92, 145,700.97 and 71,616.90 is: 98,794.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,619.92 : 145,700.97 = 71,616.90 : x
  2. Step 2: Convert to fraction form
    105,619.92/145,700.97 = 71,616.90/x
  3. Step 3: Cross multiply
    105,619.92x = 145,700.97 × 71,616.90
  4. Step 4: Simplify right side
    105,619.92x = 10,434,651,798.39
  5. Step 5: Solve for x
    x = 10,434,651,798.39/105,619.92
  6. Step 6: Final answer
    x = 98,794.35

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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.