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Finding the Fourth Proportional to 91,124.32, 125,683.65 and 66,917.65

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Solution

The fourth proportional to 91,124.32, 125,683.65 and 66,917.65 is: 92,296.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,124.32 : 125,683.65 = 66,917.65 : x
  2. Step 2: Convert to fraction form
    91,124.32/125,683.65 = 66,917.65/x
  3. Step 3: Cross multiply
    91,124.32x = 125,683.65 × 66,917.65
  4. Step 4: Simplify right side
    91,124.32x = 8,410,454,501.42
  5. Step 5: Solve for x
    x = 8,410,454,501.42/91,124.32
  6. Step 6: Final answer
    x = 92,296.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.