Home / 66,645.18-91,980.36-38,345.40

Finding the Fourth Proportional to 66,645.18, 91,980.36 and 38,345.40

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Solution

The fourth proportional to 66,645.18, 91,980.36 and 38,345.40 is: 52,922.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,645.18 : 91,980.36 = 38,345.40 : x
  2. Step 2: Convert to fraction form
    66,645.18/91,980.36 = 38,345.40/x
  3. Step 3: Cross multiply
    66,645.18x = 91,980.36 × 38,345.40
  4. Step 4: Simplify right side
    66,645.18x = 3,527,023,696.34
  5. Step 5: Solve for x
    x = 3,527,023,696.34/66,645.18
  6. Step 6: Final answer
    x = 52,922.41

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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.