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Finding the Fourth Proportional to 152,122.80, 209,937.36 and 87,601.68

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Solution

The fourth proportional to 152,122.80, 209,937.36 and 87,601.68 is: 120,894.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,122.80 : 209,937.36 = 87,601.68 : x
  2. Step 2: Convert to fraction form
    152,122.80/209,937.36 = 87,601.68/x
  3. Step 3: Cross multiply
    152,122.80x = 209,937.36 × 87,601.68
  4. Step 4: Simplify right side
    152,122.80x = 18,390,865,430.76
  5. Step 5: Solve for x
    x = 18,390,865,430.76/152,122.80
  6. Step 6: Final answer
    x = 120,894.87

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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.