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Finding the Fourth Proportional to 66,808.40, 100,228.80 and 47,125.40

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Solution

The fourth proportional to 66,808.40, 100,228.80 and 47,125.40 is: 70,699.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,808.40 : 100,228.80 = 47,125.40 : x
  2. Step 2: Convert to fraction form
    66,808.40/100,228.80 = 47,125.40/x
  3. Step 3: Cross multiply
    66,808.40x = 100,228.80 × 47,125.40
  4. Step 4: Simplify right side
    66,808.40x = 4,723,322,291.52
  5. Step 5: Solve for x
    x = 4,723,322,291.52/66,808.40
  6. Step 6: Final answer
    x = 70,699.53

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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.