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Finding the Fourth Proportional to 154,038.32, 212,548.92 and 86,968.88

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Solution

The fourth proportional to 154,038.32, 212,548.92 and 86,968.88 is: 120,003.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,038.32 : 212,548.92 = 86,968.88 : x
  2. Step 2: Convert to fraction form
    154,038.32/212,548.92 = 86,968.88/x
  3. Step 3: Cross multiply
    154,038.32x = 212,548.92 × 86,968.88
  4. Step 4: Simplify right side
    154,038.32x = 18,485,141,517.61
  5. Step 5: Solve for x
    x = 18,485,141,517.61/154,038.32
  6. Step 6: Final answer
    x = 120,003.53

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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.