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Finding the Fourth Proportional to 158,655.40, 218,943.18 and 86,058.11

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Solution

The fourth proportional to 158,655.40, 218,943.18 and 86,058.11 is: 118,759.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,655.40 : 218,943.18 = 86,058.11 : x
  2. Step 2: Convert to fraction form
    158,655.40/218,943.18 = 86,058.11/x
  3. Step 3: Cross multiply
    158,655.40x = 218,943.18 × 86,058.11
  4. Step 4: Simplify right side
    158,655.40x = 18,841,836,268.19
  5. Step 5: Solve for x
    x = 18,841,836,268.19/158,655.40
  6. Step 6: Final answer
    x = 118,759.50

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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.