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Finding the Fourth Proportional to 154,162.16, 212,778.12 and 93,720

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Solution

The fourth proportional to 154,162.16, 212,778.12 and 93,720 is: 129,354.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,162.16 : 212,778.12 = 93,720 : x
  2. Step 2: Convert to fraction form
    154,162.16/212,778.12 = 93,720/x
  3. Step 3: Cross multiply
    154,162.16x = 212,778.12 × 93,720
  4. Step 4: Simplify right side
    154,162.16x = 19,941,565,406.40
  5. Step 5: Solve for x
    x = 19,941,565,406.40/154,162.16
  6. Step 6: Final answer
    x = 129,354.48

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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.