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Finding the Fourth Proportional to 53,068.61, 79,603.79 and 42,489.60

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Solution

The fourth proportional to 53,068.61, 79,603.79 and 42,489.60 is: 63,735.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,068.61 : 79,603.79 = 42,489.60 : x
  2. Step 2: Convert to fraction form
    53,068.61/79,603.79 = 42,489.60/x
  3. Step 3: Cross multiply
    53,068.61x = 79,603.79 × 42,489.60
  4. Step 4: Simplify right side
    53,068.61x = 3,382,332,983.14
  5. Step 5: Solve for x
    x = 3,382,332,983.14/53,068.61
  6. Step 6: Final answer
    x = 63,735.10

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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.