Home / 154,437.76-213,112.33-86,439.16

Finding the Fourth Proportional to 154,437.76, 213,112.33 and 86,439.16

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Solution

The fourth proportional to 154,437.76, 213,112.33 and 86,439.16 is: 119,279.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,437.76 : 213,112.33 = 86,439.16 : x
  2. Step 2: Convert to fraction form
    154,437.76/213,112.33 = 86,439.16/x
  3. Step 3: Cross multiply
    154,437.76x = 213,112.33 × 86,439.16
  4. Step 4: Simplify right side
    154,437.76x = 18,421,250,790.84
  5. Step 5: Solve for x
    x = 18,421,250,790.84/154,437.76
  6. Step 6: Final answer
    x = 119,279.45

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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.