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Finding the Fourth Proportional to 90,348.40, 124,799.70 and 69,386.68

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Solution

The fourth proportional to 90,348.40, 124,799.70 and 69,386.68 is: 95,844.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,348.40 : 124,799.70 = 69,386.68 : x
  2. Step 2: Convert to fraction form
    90,348.40/124,799.70 = 69,386.68/x
  3. Step 3: Cross multiply
    90,348.40x = 124,799.70 × 69,386.68
  4. Step 4: Simplify right side
    90,348.40x = 8,659,436,848.00
  5. Step 5: Solve for x
    x = 8,659,436,848.00/90,348.40
  6. Step 6: Final answer
    x = 95,844.94

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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.