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Finding the Fourth Proportional to 91,168.64, 136,393.32 and 69,045.92

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Solution

The fourth proportional to 91,168.64, 136,393.32 and 69,045.92 is: 103,296.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,168.64 : 136,393.32 = 69,045.92 : x
  2. Step 2: Convert to fraction form
    91,168.64/136,393.32 = 69,045.92/x
  3. Step 3: Cross multiply
    91,168.64x = 136,393.32 × 69,045.92
  4. Step 4: Simplify right side
    91,168.64x = 9,417,402,261.25
  5. Step 5: Solve for x
    x = 9,417,402,261.25/91,168.64
  6. Step 6: Final answer
    x = 103,296.51

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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.