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Finding the Fourth Proportional to 90,545.40, 135,734.95 and 31,339.67

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Solution

The fourth proportional to 90,545.40, 135,734.95 and 31,339.67 is: 46,980.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,545.40 : 135,734.95 = 31,339.67 : x
  2. Step 2: Convert to fraction form
    90,545.40/135,734.95 = 31,339.67/x
  3. Step 3: Cross multiply
    90,545.40x = 135,734.95 × 31,339.67
  4. Step 4: Simplify right side
    90,545.40x = 4,253,887,783.44
  5. Step 5: Solve for x
    x = 4,253,887,783.44/90,545.40
  6. Step 6: Final answer
    x = 46,980.72

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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.