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Finding the Fourth Proportional to 158,702.67, 219,015.78 and 90,719.76

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Solution

The fourth proportional to 158,702.67, 219,015.78 and 90,719.76 is: 125,196.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,702.67 : 219,015.78 = 90,719.76 : x
  2. Step 2: Convert to fraction form
    158,702.67/219,015.78 = 90,719.76/x
  3. Step 3: Cross multiply
    158,702.67x = 219,015.78 × 90,719.76
  4. Step 4: Simplify right side
    158,702.67x = 19,869,058,997.81
  5. Step 5: Solve for x
    x = 19,869,058,997.81/158,702.67
  6. Step 6: Final answer
    x = 125,196.75

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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.