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Finding the Fourth Proportional to 47,988, 66,328.32 and 42,279.12

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Solution

The fourth proportional to 47,988, 66,328.32 and 42,279.12 is: 58,437.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,988 : 66,328.32 = 42,279.12 : x
  2. Step 2: Convert to fraction form
    47,988/66,328.32 = 42,279.12/x
  3. Step 3: Cross multiply
    47,988x = 66,328.32 × 42,279.12
  4. Step 4: Simplify right side
    47,988x = 2,804,303,000.68
  5. Step 5: Solve for x
    x = 2,804,303,000.68/47,988
  6. Step 6: Final answer
    x = 58,437.59

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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.