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Finding the Fourth Proportional to 279,281.60, 418,903.20 and 89,739.20

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Solution

The fourth proportional to 279,281.60, 418,903.20 and 89,739.20 is: 134,602.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,281.60 : 418,903.20 = 89,739.20 : x
  2. Step 2: Convert to fraction form
    279,281.60/418,903.20 = 89,739.20/x
  3. Step 3: Cross multiply
    279,281.60x = 418,903.20 × 89,739.20
  4. Step 4: Simplify right side
    279,281.60x = 37,592,038,045.44
  5. Step 5: Solve for x
    x = 37,592,038,045.44/279,281.60
  6. Step 6: Final answer
    x = 134,602.63

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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.