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Finding the Fourth Proportional to 90,856.40, 136,430.40 and 61,404.80

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Solution

The fourth proportional to 90,856.40, 136,430.40 and 61,404.80 is: 92,205.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,856.40 : 136,430.40 = 61,404.80 : x
  2. Step 2: Convert to fraction form
    90,856.40/136,430.40 = 61,404.80/x
  3. Step 3: Cross multiply
    90,856.40x = 136,430.40 × 61,404.80
  4. Step 4: Simplify right side
    90,856.40x = 8,377,481,425.92
  5. Step 5: Solve for x
    x = 8,377,481,425.92/90,856.40
  6. Step 6: Final answer
    x = 92,205.74

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