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Finding the Fourth Proportional to 70,987.68, 97,963.52 and 39,155.76

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Solution

The fourth proportional to 70,987.68, 97,963.52 and 39,155.76 is: 54,035.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,987.68 : 97,963.52 = 39,155.76 : x
  2. Step 2: Convert to fraction form
    70,987.68/97,963.52 = 39,155.76/x
  3. Step 3: Cross multiply
    70,987.68x = 97,963.52 × 39,155.76
  4. Step 4: Simplify right side
    70,987.68x = 3,835,836,077.88
  5. Step 5: Solve for x
    x = 3,835,836,077.88/70,987.68
  6. Step 6: Final answer
    x = 54,035.24

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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.