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Finding the Fourth Proportional to 85,364.60, 128,046.90 and 40,980.65

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Solution

The fourth proportional to 85,364.60, 128,046.90 and 40,980.65 is: 61,470.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,364.60 : 128,046.90 = 40,980.65 : x
  2. Step 2: Convert to fraction form
    85,364.60/128,046.90 = 40,980.65/x
  3. Step 3: Cross multiply
    85,364.60x = 128,046.90 × 40,980.65
  4. Step 4: Simplify right side
    85,364.60x = 5,247,445,192.49
  5. Step 5: Solve for x
    x = 5,247,445,192.49/85,364.60
  6. Step 6: Final answer
    x = 61,470.98

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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.