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Finding the Fourth Proportional to 99,159.68, 136,831.92 and 56,709.92

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Solution

The fourth proportional to 99,159.68, 136,831.92 and 56,709.92 is: 78,254.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,159.68 : 136,831.92 = 56,709.92 : x
  2. Step 2: Convert to fraction form
    99,159.68/136,831.92 = 56,709.92/x
  3. Step 3: Cross multiply
    99,159.68x = 136,831.92 × 56,709.92
  4. Step 4: Simplify right side
    99,159.68x = 7,759,727,236.65
  5. Step 5: Solve for x
    x = 7,759,727,236.65/99,159.68
  6. Step 6: Final answer
    x = 78,254.86

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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.