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Finding the Fourth Proportional to 158,374.30, 218,560.06 and 90,389.90

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Solution

The fourth proportional to 158,374.30, 218,560.06 and 90,389.90 is: 124,740.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,374.30 : 218,560.06 = 90,389.90 : x
  2. Step 2: Convert to fraction form
    158,374.30/218,560.06 = 90,389.90/x
  3. Step 3: Cross multiply
    158,374.30x = 218,560.06 × 90,389.90
  4. Step 4: Simplify right side
    158,374.30x = 19,755,621,967.39
  5. Step 5: Solve for x
    x = 19,755,621,967.39/158,374.30
  6. Step 6: Final answer
    x = 124,740.07

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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.