Home / 74,588.72-102,909.20-42,318

Finding the Fourth Proportional to 74,588.72, 102,909.20 and 42,318

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Solution

The fourth proportional to 74,588.72, 102,909.20 and 42,318 is: 58,385.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,588.72 : 102,909.20 = 42,318 : x
  2. Step 2: Convert to fraction form
    74,588.72/102,909.20 = 42,318/x
  3. Step 3: Cross multiply
    74,588.72x = 102,909.20 × 42,318
  4. Step 4: Simplify right side
    74,588.72x = 4,354,911,525.60
  5. Step 5: Solve for x
    x = 4,354,911,525.60/74,588.72
  6. Step 6: Final answer
    x = 58,385.66

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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.