Home / 154,289.18-212,938.76-86,309.93

Finding the Fourth Proportional to 154,289.18, 212,938.76 and 86,309.93

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Solution

The fourth proportional to 154,289.18, 212,938.76 and 86,309.93 is: 119,118.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,289.18 : 212,938.76 = 86,309.93 : x
  2. Step 2: Convert to fraction form
    154,289.18/212,938.76 = 86,309.93/x
  3. Step 3: Cross multiply
    154,289.18x = 212,938.76 × 86,309.93
  4. Step 4: Simplify right side
    154,289.18x = 18,378,729,469.89
  5. Step 5: Solve for x
    x = 18,378,729,469.89/154,289.18
  6. Step 6: Final answer
    x = 119,118.72

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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.