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Finding the Fourth Proportional to 61,045.40, 91,568.10 and 51,203.90

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Solution

The fourth proportional to 61,045.40, 91,568.10 and 51,203.90 is: 76,805.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,045.40 : 91,568.10 = 51,203.90 : x
  2. Step 2: Convert to fraction form
    61,045.40/91,568.10 = 51,203.90/x
  3. Step 3: Cross multiply
    61,045.40x = 91,568.10 × 51,203.90
  4. Step 4: Simplify right side
    61,045.40x = 4,688,643,835.59
  5. Step 5: Solve for x
    x = 4,688,643,835.59/61,045.40
  6. Step 6: Final answer
    x = 76,805.85

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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.