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Finding the Fourth Proportional to 159,345.86, 219,888.92 and 87,711.89

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Solution

The fourth proportional to 159,345.86, 219,888.92 and 87,711.89 is: 121,037.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,345.86 : 219,888.92 = 87,711.89 : x
  2. Step 2: Convert to fraction form
    159,345.86/219,888.92 = 87,711.89/x
  3. Step 3: Cross multiply
    159,345.86x = 219,888.92 × 87,711.89
  4. Step 4: Simplify right side
    159,345.86x = 19,286,871,225.25
  5. Step 5: Solve for x
    x = 19,286,871,225.25/159,345.86
  6. Step 6: Final answer
    x = 121,037.80

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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.