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Finding the Fourth Proportional to 145,007.80, 217,511.70 and 135,166.30

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Solution

The fourth proportional to 145,007.80, 217,511.70 and 135,166.30 is: 202,749.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,007.80 : 217,511.70 = 135,166.30 : x
  2. Step 2: Convert to fraction form
    145,007.80/217,511.70 = 135,166.30/x
  3. Step 3: Cross multiply
    145,007.80x = 217,511.70 × 135,166.30
  4. Step 4: Simplify right side
    145,007.80x = 29,400,251,695.71
  5. Step 5: Solve for x
    x = 29,400,251,695.71/145,007.80
  6. Step 6: Final answer
    x = 202,749.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.