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Finding the Fourth Proportional to 268,612.47, 402,907.91 and 91,119.87

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Solution

The fourth proportional to 268,612.47, 402,907.91 and 91,119.87 is: 136,676.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,612.47 : 402,907.91 = 91,119.87 : x
  2. Step 2: Convert to fraction form
    268,612.47/402,907.91 = 91,119.87/x
  3. Step 3: Cross multiply
    268,612.47x = 402,907.91 × 91,119.87
  4. Step 4: Simplify right side
    268,612.47x = 36,712,915,925.57
  5. Step 5: Solve for x
    x = 36,712,915,925.57/268,612.47
  6. Step 6: Final answer
    x = 136,676.14

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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.