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Finding the Fourth Proportional to 74,322.56, 102,532.80 and 42,479.84

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Solution

The fourth proportional to 74,322.56, 102,532.80 and 42,479.84 is: 58,603.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,322.56 : 102,532.80 = 42,479.84 : x
  2. Step 2: Convert to fraction form
    74,322.56/102,532.80 = 42,479.84/x
  3. Step 3: Cross multiply
    74,322.56x = 102,532.80 × 42,479.84
  4. Step 4: Simplify right side
    74,322.56x = 4,355,576,938.75
  5. Step 5: Solve for x
    x = 4,355,576,938.75/74,322.56
  6. Step 6: Final answer
    x = 58,603.70

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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.