Home / 154,332.38-212,986.95-86,345.30

Finding the Fourth Proportional to 154,332.38, 212,986.95 and 86,345.30

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Solution

The fourth proportional to 154,332.38, 212,986.95 and 86,345.30 is: 119,161.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,332.38 : 212,986.95 = 86,345.30 : x
  2. Step 2: Convert to fraction form
    154,332.38/212,986.95 = 86,345.30/x
  3. Step 3: Cross multiply
    154,332.38x = 212,986.95 × 86,345.30
  4. Step 4: Simplify right side
    154,332.38x = 18,390,421,028.90
  5. Step 5: Solve for x
    x = 18,390,421,028.90/154,332.38
  6. Step 6: Final answer
    x = 119,161.14

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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.