Home / 66,387.09-91,572.31-39,509.53

Finding the Fourth Proportional to 66,387.09, 91,572.31 and 39,509.53

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Solution

The fourth proportional to 66,387.09, 91,572.31 and 39,509.53 is: 54,498.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,387.09 : 91,572.31 = 39,509.53 : x
  2. Step 2: Convert to fraction form
    66,387.09/91,572.31 = 39,509.53/x
  3. Step 3: Cross multiply
    66,387.09x = 91,572.31 × 39,509.53
  4. Step 4: Simplify right side
    66,387.09x = 3,617,978,929.11
  5. Step 5: Solve for x
    x = 3,617,978,929.11/66,387.09
  6. Step 6: Final answer
    x = 54,498.23

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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.