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Finding the Fourth Proportional to 70,987.96, 97,962.42 and 39,156.76

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Solution

The fourth proportional to 70,987.96, 97,962.42 and 39,156.76 is: 54,035.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,987.96 : 97,962.42 = 39,156.76 : x
  2. Step 2: Convert to fraction form
    70,987.96/97,962.42 = 39,156.76/x
  3. Step 3: Cross multiply
    70,987.96x = 97,962.42 × 39,156.76
  4. Step 4: Simplify right side
    70,987.96x = 3,835,890,968.96
  5. Step 5: Solve for x
    x = 3,835,890,968.96/70,987.96
  6. Step 6: Final answer
    x = 54,035.80

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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.