Home / 154,331.38-212,985.57-86,344.30

Finding the Fourth Proportional to 154,331.38, 212,985.57 and 86,344.30

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Solution

The fourth proportional to 154,331.38, 212,985.57 and 86,344.30 is: 119,159.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,331.38 : 212,985.57 = 86,344.30 : x
  2. Step 2: Convert to fraction form
    154,331.38/212,985.57 = 86,344.30/x
  3. Step 3: Cross multiply
    154,331.38x = 212,985.57 × 86,344.30
  4. Step 4: Simplify right side
    154,331.38x = 18,390,088,886.82
  5. Step 5: Solve for x
    x = 18,390,088,886.82/154,331.38
  6. Step 6: Final answer
    x = 119,159.76

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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.