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Finding the Fourth Proportional to 159,420.36, 220,000.20 and 87,800.28

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Solution

The fourth proportional to 159,420.36, 220,000.20 and 87,800.28 is: 121,164.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,420.36 : 220,000.20 = 87,800.28 : x
  2. Step 2: Convert to fraction form
    159,420.36/220,000.20 = 87,800.28/x
  3. Step 3: Cross multiply
    159,420.36x = 220,000.20 × 87,800.28
  4. Step 4: Simplify right side
    159,420.36x = 19,316,079,160.06
  5. Step 5: Solve for x
    x = 19,316,079,160.06/159,420.36
  6. Step 6: Final answer
    x = 121,164.44

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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.