Home / 87,900.62-121,269.33-64,985.49

Finding the Fourth Proportional to 87,900.62, 121,269.33 and 64,985.49

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Solution

The fourth proportional to 87,900.62, 121,269.33 and 64,985.49 is: 89,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,900.62 : 121,269.33 = 64,985.49 : x
  2. Step 2: Convert to fraction form
    87,900.62/121,269.33 = 64,985.49/x
  3. Step 3: Cross multiply
    87,900.62x = 121,269.33 × 64,985.49
  4. Step 4: Simplify right side
    87,900.62x = 7,880,746,832.02
  5. Step 5: Solve for x
    x = 7,880,746,832.02/87,900.62
  6. Step 6: Final answer
    x = 89,655.20

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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.