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Finding the Fourth Proportional to 124,814, 187,221 and 113,988.35

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Solution

The fourth proportional to 124,814, 187,221 and 113,988.35 is: 170,982.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,814 : 187,221 = 113,988.35 : x
  2. Step 2: Convert to fraction form
    124,814/187,221 = 113,988.35/x
  3. Step 3: Cross multiply
    124,814x = 187,221 × 113,988.35
  4. Step 4: Simplify right side
    124,814x = 21,341,012,875.35
  5. Step 5: Solve for x
    x = 21,341,012,875.35/124,814
  6. Step 6: Final answer
    x = 170,982.53

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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.