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Finding the Fourth Proportional to 159,530.40, 220,151.50 and 87,910.40

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Solution

The fourth proportional to 159,530.40, 220,151.50 and 87,910.40 is: 121,316.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,530.40 : 220,151.50 = 87,910.40 : x
  2. Step 2: Convert to fraction form
    159,530.40/220,151.50 = 87,910.40/x
  3. Step 3: Cross multiply
    159,530.40x = 220,151.50 × 87,910.40
  4. Step 4: Simplify right side
    159,530.40x = 19,353,606,756.20
  5. Step 5: Solve for x
    x = 19,353,606,756.20/159,530.40
  6. Step 6: Final answer
    x = 121,316.10

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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.