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Finding the Fourth Proportional to 122,386.68, 168,929.28 and 79,951.32

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Solution

The fourth proportional to 122,386.68, 168,929.28 and 79,951.32 is: 110,356.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,386.68 : 168,929.28 = 79,951.32 : x
  2. Step 2: Convert to fraction form
    122,386.68/168,929.28 = 79,951.32/x
  3. Step 3: Cross multiply
    122,386.68x = 168,929.28 × 79,951.32
  4. Step 4: Simplify right side
    122,386.68x = 13,506,118,922.65
  5. Step 5: Solve for x
    x = 13,506,118,922.65/122,386.68
  6. Step 6: Final answer
    x = 110,356.12

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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.