Home / 66,378.08-91,570.80-39,505.52

Finding the Fourth Proportional to 66,378.08, 91,570.80 and 39,505.52

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Solution

The fourth proportional to 66,378.08, 91,570.80 and 39,505.52 is: 54,499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,378.08 : 91,570.80 = 39,505.52 : x
  2. Step 2: Convert to fraction form
    66,378.08/91,570.80 = 39,505.52/x
  3. Step 3: Cross multiply
    66,378.08x = 91,570.80 × 39,505.52
  4. Step 4: Simplify right side
    66,378.08x = 3,617,552,070.82
  5. Step 5: Solve for x
    x = 3,617,552,070.82/66,378.08
  6. Step 6: Final answer
    x = 54,499.20

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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.