Home / 66,276.47-91,431.32-39,403.71

Finding the Fourth Proportional to 66,276.47, 91,431.32 and 39,403.71

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Solution

The fourth proportional to 66,276.47, 91,431.32 and 39,403.71 is: 54,359.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,276.47 : 91,431.32 = 39,403.71 : x
  2. Step 2: Convert to fraction form
    66,276.47/91,431.32 = 39,403.71/x
  3. Step 3: Cross multiply
    66,276.47x = 91,431.32 × 39,403.71
  4. Step 4: Simplify right side
    66,276.47x = 3,602,733,021.18
  5. Step 5: Solve for x
    x = 3,602,733,021.18/66,276.47
  6. Step 6: Final answer
    x = 54,359.15

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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.