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Finding the Fourth Proportional to 138,730.16, 208,104.63 and 48,761.93

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Solution

The fourth proportional to 138,730.16, 208,104.63 and 48,761.93 is: 73,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,730.16 : 208,104.63 = 48,761.93 : x
  2. Step 2: Convert to fraction form
    138,730.16/208,104.63 = 48,761.93/x
  3. Step 3: Cross multiply
    138,730.16x = 208,104.63 × 48,761.93
  4. Step 4: Simplify right side
    138,730.16x = 10,147,583,400.74
  5. Step 5: Solve for x
    x = 10,147,583,400.74/138,730.16
  6. Step 6: Final answer
    x = 73,146.20

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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.