Home / 154,319.19-212,968.75-86,332.10

Finding the Fourth Proportional to 154,319.19, 212,968.75 and 86,332.10

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Solution

The fourth proportional to 154,319.19, 212,968.75 and 86,332.10 is: 119,142.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,319.19 : 212,968.75 = 86,332.10 : x
  2. Step 2: Convert to fraction form
    154,319.19/212,968.75 = 86,332.10/x
  3. Step 3: Cross multiply
    154,319.19x = 212,968.75 × 86,332.10
  4. Step 4: Simplify right side
    154,319.19x = 18,386,039,421.88
  5. Step 5: Solve for x
    x = 18,386,039,421.88/154,319.19
  6. Step 6: Final answer
    x = 119,142.92

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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.