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Finding the Fourth Proportional to 90,549.80, 135,848.20 and 34,390.88

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Solution

The fourth proportional to 90,549.80, 135,848.20 and 34,390.88 is: 51,595.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,549.80 : 135,848.20 = 34,390.88 : x
  2. Step 2: Convert to fraction form
    90,549.80/135,848.20 = 34,390.88/x
  3. Step 3: Cross multiply
    90,549.80x = 135,848.20 × 34,390.88
  4. Step 4: Simplify right side
    90,549.80x = 4,671,939,144.42
  5. Step 5: Solve for x
    x = 4,671,939,144.42/90,549.80
  6. Step 6: Final answer
    x = 51,595.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.