Home / 66,109.03-91,221.28-38,886.35

Finding the Fourth Proportional to 66,109.03, 91,221.28 and 38,886.35

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Solution

The fourth proportional to 66,109.03, 91,221.28 and 38,886.35 is: 53,657.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,109.03 : 91,221.28 = 38,886.35 : x
  2. Step 2: Convert to fraction form
    66,109.03/91,221.28 = 38,886.35/x
  3. Step 3: Cross multiply
    66,109.03x = 91,221.28 × 38,886.35
  4. Step 4: Simplify right side
    66,109.03x = 3,547,262,068.21
  5. Step 5: Solve for x
    x = 3,547,262,068.21/66,109.03
  6. Step 6: Final answer
    x = 53,657.76

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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.