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Finding the Fourth Proportional to 158,588.90, 218,858.99 and 86,971.49

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Solution

The fourth proportional to 158,588.90, 218,858.99 and 86,971.49 is: 120,024.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,588.90 : 218,858.99 = 86,971.49 : x
  2. Step 2: Convert to fraction form
    158,588.90/218,858.99 = 86,971.49/x
  3. Step 3: Cross multiply
    158,588.90x = 218,858.99 × 86,971.49
  4. Step 4: Simplify right side
    158,588.90x = 19,034,490,931.04
  5. Step 5: Solve for x
    x = 19,034,490,931.04/158,588.90
  6. Step 6: Final answer
    x = 120,024.11

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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.