Home / 154,638.81-213,382.88-86,640.20

Finding the Fourth Proportional to 154,638.81, 213,382.88 and 86,640.20

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Solution

The fourth proportional to 154,638.81, 213,382.88 and 86,640.20 is: 119,553.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,638.81 : 213,382.88 = 86,640.20 : x
  2. Step 2: Convert to fraction form
    154,638.81/213,382.88 = 86,640.20/x
  3. Step 3: Cross multiply
    154,638.81x = 213,382.88 × 86,640.20
  4. Step 4: Simplify right side
    154,638.81x = 18,487,533,899.66
  5. Step 5: Solve for x
    x = 18,487,533,899.66/154,638.81
  6. Step 6: Final answer
    x = 119,553.00

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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.