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Finding the Fourth Proportional to 70,987.91, 97,963.31 and 39,156.82

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Solution

The fourth proportional to 70,987.91, 97,963.31 and 39,156.82 is: 54,036.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,987.91 : 97,963.31 = 39,156.82 : x
  2. Step 2: Convert to fraction form
    70,987.91/97,963.31 = 39,156.82/x
  3. Step 3: Cross multiply
    70,987.91x = 97,963.31 × 39,156.82
  4. Step 4: Simplify right side
    70,987.91x = 3,835,931,549.26
  5. Step 5: Solve for x
    x = 3,835,931,549.26/70,987.91
  6. Step 6: Final answer
    x = 54,036.41

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1.5x scale

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.