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Finding the Fourth Proportional to 159,535.40, 220,158.40 and 87,915.40

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Solution

The fourth proportional to 159,535.40, 220,158.40 and 87,915.40 is: 121,323.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,535.40 : 220,158.40 = 87,915.40 : x
  2. Step 2: Convert to fraction form
    159,535.40/220,158.40 = 87,915.40/x
  3. Step 3: Cross multiply
    159,535.40x = 220,158.40 × 87,915.40
  4. Step 4: Simplify right side
    159,535.40x = 19,355,313,799.36
  5. Step 5: Solve for x
    x = 19,355,313,799.36/159,535.40
  6. Step 6: Final answer
    x = 121,323.00

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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.