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Finding the Fourth Proportional to 158,621.16, 218,903.50 and 87,003.80

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Solution

The fourth proportional to 158,621.16, 218,903.50 and 87,003.80 is: 120,068.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,621.16 : 218,903.50 = 87,003.80 : x
  2. Step 2: Convert to fraction form
    158,621.16/218,903.50 = 87,003.80/x
  3. Step 3: Cross multiply
    158,621.16x = 218,903.50 × 87,003.80
  4. Step 4: Simplify right side
    158,621.16x = 19,045,436,333.30
  5. Step 5: Solve for x
    x = 19,045,436,333.30/158,621.16
  6. Step 6: Final answer
    x = 120,068.70

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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.