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Finding the Fourth Proportional to 66,443.74, 91,700.64 and 38,148.82

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Solution

The fourth proportional to 66,443.74, 91,700.64 and 38,148.82 is: 52,650.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,443.74 : 91,700.64 = 38,148.82 : x
  2. Step 2: Convert to fraction form
    66,443.74/91,700.64 = 38,148.82/x
  3. Step 3: Cross multiply
    66,443.74x = 91,700.64 × 38,148.82
  4. Step 4: Simplify right side
    66,443.74x = 3,498,271,209.24
  5. Step 5: Solve for x
    x = 3,498,271,209.24/66,443.74
  6. Step 6: Final answer
    x = 52,650.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.