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Finding the Fourth Proportional to 268,479.17, 402,718.59 and 78,941.11

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Solution

The fourth proportional to 268,479.17, 402,718.59 and 78,941.11 is: 118,411.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,479.17 : 402,718.59 = 78,941.11 : x
  2. Step 2: Convert to fraction form
    268,479.17/402,718.59 = 78,941.11/x
  3. Step 3: Cross multiply
    268,479.17x = 402,718.59 × 78,941.11
  4. Step 4: Simplify right side
    268,479.17x = 31,791,051,349.91
  5. Step 5: Solve for x
    x = 31,791,051,349.91/268,479.17
  6. Step 6: Final answer
    x = 118,411.61

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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.