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Finding the Fourth Proportional to 158,683.34, 218,983.01 and 90,701.78

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Solution

The fourth proportional to 158,683.34, 218,983.01 and 90,701.78 is: 125,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,683.34 : 218,983.01 = 90,701.78 : x
  2. Step 2: Convert to fraction form
    158,683.34/218,983.01 = 90,701.78/x
  3. Step 3: Cross multiply
    158,683.34x = 218,983.01 × 90,701.78
  4. Step 4: Simplify right side
    158,683.34x = 19,862,147,248.33
  5. Step 5: Solve for x
    x = 19,862,147,248.33/158,683.34
  6. Step 6: Final answer
    x = 125,168.45

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1.5x scale

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.