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Finding the Fourth Proportional to 113,386.80, 169,934.40 and 68,966.40

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Solution

The fourth proportional to 113,386.80, 169,934.40 and 68,966.40 is: 103,360.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,386.80 : 169,934.40 = 68,966.40 : x
  2. Step 2: Convert to fraction form
    113,386.80/169,934.40 = 68,966.40/x
  3. Step 3: Cross multiply
    113,386.80x = 169,934.40 × 68,966.40
  4. Step 4: Simplify right side
    113,386.80x = 11,719,763,804.16
  5. Step 5: Solve for x
    x = 11,719,763,804.16/113,386.80
  6. Step 6: Final answer
    x = 103,360.92

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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.