Home / 66,695.04-91,949.09-42,780.20

Finding the Fourth Proportional to 66,695.04, 91,949.09 and 42,780.20

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Solution

The fourth proportional to 66,695.04, 91,949.09 and 42,780.20 is: 58,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,695.04 : 91,949.09 = 42,780.20 : x
  2. Step 2: Convert to fraction form
    66,695.04/91,949.09 = 42,780.20/x
  3. Step 3: Cross multiply
    66,695.04x = 91,949.09 × 42,780.20
  4. Step 4: Simplify right side
    66,695.04x = 3,933,599,786.37
  5. Step 5: Solve for x
    x = 3,933,599,786.37/66,695.04
  6. Step 6: Final answer
    x = 58,978.90

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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.