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Finding the Fourth Proportional to 51,128.88, 70,552.80 and 29,904

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Solution

The fourth proportional to 51,128.88, 70,552.80 and 29,904 is: 41,264.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,128.88 : 70,552.80 = 29,904 : x
  2. Step 2: Convert to fraction form
    51,128.88/70,552.80 = 29,904/x
  3. Step 3: Cross multiply
    51,128.88x = 70,552.80 × 29,904
  4. Step 4: Simplify right side
    51,128.88x = 2,109,810,931.20
  5. Step 5: Solve for x
    x = 2,109,810,931.20/51,128.88
  6. Step 6: Final answer
    x = 41,264.56

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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.