Home / 145,463.76-200,728.08-81,789.68

Finding the Fourth Proportional to 145,463.76, 200,728.08 and 81,789.68

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Solution

The fourth proportional to 145,463.76, 200,728.08 and 81,789.68 is: 112,863.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,463.76 : 200,728.08 = 81,789.68 : x
  2. Step 2: Convert to fraction form
    145,463.76/200,728.08 = 81,789.68/x
  3. Step 3: Cross multiply
    145,463.76x = 200,728.08 × 81,789.68
  4. Step 4: Simplify right side
    145,463.76x = 16,417,485,430.21
  5. Step 5: Solve for x
    x = 16,417,485,430.21/145,463.76
  6. Step 6: Final answer
    x = 112,863.06

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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.