Home / 66,109.17-91,221.47-38,886.49

Finding the Fourth Proportional to 66,109.17, 91,221.47 and 38,886.49

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Solution

The fourth proportional to 66,109.17, 91,221.47 and 38,886.49 is: 53,657.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,109.17 : 91,221.47 = 38,886.49 : x
  2. Step 2: Convert to fraction form
    66,109.17/91,221.47 = 38,886.49/x
  3. Step 3: Cross multiply
    66,109.17x = 91,221.47 × 38,886.49
  4. Step 4: Simplify right side
    66,109.17x = 3,547,283,065.10
  5. Step 5: Solve for x
    x = 3,547,283,065.10/66,109.17
  6. Step 6: Final answer
    x = 53,657.95

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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.