Home / 154,655.90-213,442.91-86,691.26

Finding the Fourth Proportional to 154,655.90, 213,442.91 and 86,691.26

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Solution

The fourth proportional to 154,655.90, 213,442.91 and 86,691.26 is: 119,643.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,655.90 : 213,442.91 = 86,691.26 : x
  2. Step 2: Convert to fraction form
    154,655.90/213,442.91 = 86,691.26/x
  3. Step 3: Cross multiply
    154,655.90x = 213,442.91 × 86,691.26
  4. Step 4: Simplify right side
    154,655.90x = 18,503,634,805.97
  5. Step 5: Solve for x
    x = 18,503,634,805.97/154,655.90
  6. Step 6: Final answer
    x = 119,643.90

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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.