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Finding the Fourth Proportional to 104,718.87, 157,018.79 and 71,479.17

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Solution

The fourth proportional to 104,718.87, 157,018.79 and 71,479.17 is: 107,178.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,718.87 : 157,018.79 = 71,479.17 : x
  2. Step 2: Convert to fraction form
    104,718.87/157,018.79 = 71,479.17/x
  3. Step 3: Cross multiply
    104,718.87x = 157,018.79 × 71,479.17
  4. Step 4: Simplify right side
    104,718.87x = 11,223,572,426.21
  5. Step 5: Solve for x
    x = 11,223,572,426.21/104,718.87
  6. Step 6: Final answer
    x = 107,178.13

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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.