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Finding the Fourth Proportional to 138,300.87, 207,642.39 and 95,505.91

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Solution

The fourth proportional to 138,300.87, 207,642.39 and 95,505.91 is: 143,390.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,300.87 : 207,642.39 = 95,505.91 : x
  2. Step 2: Convert to fraction form
    138,300.87/207,642.39 = 95,505.91/x
  3. Step 3: Cross multiply
    138,300.87x = 207,642.39 × 95,505.91
  4. Step 4: Simplify right side
    138,300.87x = 19,831,075,411.52
  5. Step 5: Solve for x
    x = 19,831,075,411.52/138,300.87
  6. Step 6: Final answer
    x = 143,390.82

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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.