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Finding the Fourth Proportional to 90,888.75, 136,333.80 and 31,724.47

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Solution

The fourth proportional to 90,888.75, 136,333.80 and 31,724.47 is: 47,586.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,888.75 : 136,333.80 = 31,724.47 : x
  2. Step 2: Convert to fraction form
    90,888.75/136,333.80 = 31,724.47/x
  3. Step 3: Cross multiply
    90,888.75x = 136,333.80 × 31,724.47
  4. Step 4: Simplify right side
    90,888.75x = 4,325,117,718.50
  5. Step 5: Solve for x
    x = 4,325,117,718.50/90,888.75
  6. Step 6: Final answer
    x = 47,586.94

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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.