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Finding the Fourth Proportional to 85,869.90, 128,804.85 and 59,625.90

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Solution

The fourth proportional to 85,869.90, 128,804.85 and 59,625.90 is: 89,438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,869.90 : 128,804.85 = 59,625.90 : x
  2. Step 2: Convert to fraction form
    85,869.90/128,804.85 = 59,625.90/x
  3. Step 3: Cross multiply
    85,869.90x = 128,804.85 × 59,625.90
  4. Step 4: Simplify right side
    85,869.90x = 7,680,105,105.62
  5. Step 5: Solve for x
    x = 7,680,105,105.62/85,869.90
  6. Step 6: Final answer
    x = 89,438.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.