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Finding the Fourth Proportional to 69,985.28, 104,883.96 and 38,347.76

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Solution

The fourth proportional to 69,985.28, 104,883.96 and 38,347.76 is: 57,470.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,985.28 : 104,883.96 = 38,347.76 : x
  2. Step 2: Convert to fraction form
    69,985.28/104,883.96 = 38,347.76/x
  3. Step 3: Cross multiply
    69,985.28x = 104,883.96 × 38,347.76
  4. Step 4: Simplify right side
    69,985.28x = 4,022,064,925.93
  5. Step 5: Solve for x
    x = 4,022,064,925.93/69,985.28
  6. Step 6: Final answer
    x = 57,470.16

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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.