Home / 145,454.28-200,725.65-81,790.71

Finding the Fourth Proportional to 145,454.28, 200,725.65 and 81,790.71

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Solution

The fourth proportional to 145,454.28, 200,725.65 and 81,790.71 is: 112,870.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,454.28 : 200,725.65 = 81,790.71 : x
  2. Step 2: Convert to fraction form
    145,454.28/200,725.65 = 81,790.71/x
  3. Step 3: Cross multiply
    145,454.28x = 200,725.65 × 81,790.71
  4. Step 4: Simplify right side
    145,454.28x = 16,417,493,428.71
  5. Step 5: Solve for x
    x = 16,417,493,428.71/145,454.28
  6. Step 6: Final answer
    x = 112,870.47

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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.