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Finding the Fourth Proportional to 47,978.64, 66,210.88 and 26,759.28

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Solution

The fourth proportional to 47,978.64, 66,210.88 and 26,759.28 is: 36,928.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,978.64 : 66,210.88 = 26,759.28 : x
  2. Step 2: Convert to fraction form
    47,978.64/66,210.88 = 26,759.28/x
  3. Step 3: Cross multiply
    47,978.64x = 66,210.88 × 26,759.28
  4. Step 4: Simplify right side
    47,978.64x = 1,771,755,476.97
  5. Step 5: Solve for x
    x = 1,771,755,476.97/47,978.64
  6. Step 6: Final answer
    x = 36,928.01

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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.