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Finding the Fourth Proportional to 91,856.90, 137,785.35 and 90,628.10

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Solution

The fourth proportional to 91,856.90, 137,785.35 and 90,628.10 is: 135,942.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,856.90 : 137,785.35 = 90,628.10 : x
  2. Step 2: Convert to fraction form
    91,856.90/137,785.35 = 90,628.10/x
  3. Step 3: Cross multiply
    91,856.90x = 137,785.35 × 90,628.10
  4. Step 4: Simplify right side
    91,856.90x = 12,487,224,478.34
  5. Step 5: Solve for x
    x = 12,487,224,478.34/91,856.90
  6. Step 6: Final answer
    x = 135,942.15

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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.