Home / 158,621.32-218,908.92-90,636.72

Finding the Fourth Proportional to 158,621.32, 218,908.92 and 90,636.72

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Solution

The fourth proportional to 158,621.32, 218,908.92 and 90,636.72 is: 125,085.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,621.32 : 218,908.92 = 90,636.72 : x
  2. Step 2: Convert to fraction form
    158,621.32/218,908.92 = 90,636.72/x
  3. Step 3: Cross multiply
    158,621.32x = 218,908.92 × 90,636.72
  4. Step 4: Simplify right side
    158,621.32x = 19,841,186,487.54
  5. Step 5: Solve for x
    x = 19,841,186,487.54/158,621.32
  6. Step 6: Final answer
    x = 125,085.24

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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.