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Finding the Fourth Proportional to 159,530.43, 220,153.46 and 87,913.01

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Solution

The fourth proportional to 159,530.43, 220,153.46 and 87,913.01 is: 121,320.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,530.43 : 220,153.46 = 87,913.01 : x
  2. Step 2: Convert to fraction form
    159,530.43/220,153.46 = 87,913.01/x
  3. Step 3: Cross multiply
    159,530.43x = 220,153.46 × 87,913.01
  4. Step 4: Simplify right side
    159,530.43x = 19,354,353,330.51
  5. Step 5: Solve for x
    x = 19,354,353,330.51/159,530.43
  6. Step 6: Final answer
    x = 121,320.76

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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.