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Finding the Fourth Proportional to 66,658.50, 100,036.98 and 31,598.28

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Solution

The fourth proportional to 66,658.50, 100,036.98 and 31,598.28 is: 47,420.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,658.50 : 100,036.98 = 31,598.28 : x
  2. Step 2: Convert to fraction form
    66,658.50/100,036.98 = 31,598.28/x
  3. Step 3: Cross multiply
    66,658.50x = 100,036.98 × 31,598.28
  4. Step 4: Simplify right side
    66,658.50x = 3,160,996,504.39
  5. Step 5: Solve for x
    x = 3,160,996,504.39/66,658.50
  6. Step 6: Final answer
    x = 47,420.76

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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.