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Finding the Fourth Proportional to 104,987.61, 157,474.94 and 42,656.49

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Solution

The fourth proportional to 104,987.61, 157,474.94 and 42,656.49 is: 63,982.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,987.61 : 157,474.94 = 42,656.49 : x
  2. Step 2: Convert to fraction form
    104,987.61/157,474.94 = 42,656.49/x
  3. Step 3: Cross multiply
    104,987.61x = 157,474.94 × 42,656.49
  4. Step 4: Simplify right side
    104,987.61x = 6,717,327,990.08
  5. Step 5: Solve for x
    x = 6,717,327,990.08/104,987.61
  6. Step 6: Final answer
    x = 63,982.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.