Home / 66,425.20-99,637.80-38,431.60

Finding the Fourth Proportional to 66,425.20, 99,637.80 and 38,431.60

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Solution

The fourth proportional to 66,425.20, 99,637.80 and 38,431.60 is: 57,647.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,425.20 : 99,637.80 = 38,431.60 : x
  2. Step 2: Convert to fraction form
    66,425.20/99,637.80 = 38,431.60/x
  3. Step 3: Cross multiply
    66,425.20x = 99,637.80 × 38,431.60
  4. Step 4: Simplify right side
    66,425.20x = 3,829,240,074.48
  5. Step 5: Solve for x
    x = 3,829,240,074.48/66,425.20
  6. Step 6: Final answer
    x = 57,647.40

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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.