Home / 154,319.10-212,979.96-86,339.85

Finding the Fourth Proportional to 154,319.10, 212,979.96 and 86,339.85

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Solution

The fourth proportional to 154,319.10, 212,979.96 and 86,339.85 is: 119,159.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,319.10 : 212,979.96 = 86,339.85 : x
  2. Step 2: Convert to fraction form
    154,319.10/212,979.96 = 86,339.85/x
  3. Step 3: Cross multiply
    154,319.10x = 212,979.96 × 86,339.85
  4. Step 4: Simplify right side
    154,319.10x = 18,388,657,799.41
  5. Step 5: Solve for x
    x = 18,388,657,799.41/154,319.10
  6. Step 6: Final answer
    x = 119,159.96

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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.