Home / 145,005.28-200,116.48-81,347.20

Finding the Fourth Proportional to 145,005.28, 200,116.48 and 81,347.20

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Solution

The fourth proportional to 145,005.28, 200,116.48 and 81,347.20 is: 112,264.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,005.28 : 200,116.48 = 81,347.20 : x
  2. Step 2: Convert to fraction form
    145,005.28/200,116.48 = 81,347.20/x
  3. Step 3: Cross multiply
    145,005.28x = 200,116.48 × 81,347.20
  4. Step 4: Simplify right side
    145,005.28x = 16,278,915,321.86
  5. Step 5: Solve for x
    x = 16,278,915,321.86/145,005.28
  6. Step 6: Final answer
    x = 112,264.29

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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.