Home / 109,555.64-151,173.78-61,806.20

Finding the Fourth Proportional to 109,555.64, 151,173.78 and 61,806.20

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Solution

The fourth proportional to 109,555.64, 151,173.78 and 61,806.20 is: 85,285.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,555.64 : 151,173.78 = 61,806.20 : x
  2. Step 2: Convert to fraction form
    109,555.64/151,173.78 = 61,806.20/x
  3. Step 3: Cross multiply
    109,555.64x = 151,173.78 × 61,806.20
  4. Step 4: Simplify right side
    109,555.64x = 9,343,476,881.44
  5. Step 5: Solve for x
    x = 9,343,476,881.44/109,555.64
  6. Step 6: Final answer
    x = 85,285.22

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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.