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Finding the Fourth Proportional to 72,860.52, 109,120.68 and 56,087.46

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Solution

The fourth proportional to 72,860.52, 109,120.68 and 56,087.46 is: 84,000.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,860.52 : 109,120.68 = 56,087.46 : x
  2. Step 2: Convert to fraction form
    72,860.52/109,120.68 = 56,087.46/x
  3. Step 3: Cross multiply
    72,860.52x = 109,120.68 × 56,087.46
  4. Step 4: Simplify right side
    72,860.52x = 6,120,301,774.67
  5. Step 5: Solve for x
    x = 6,120,301,774.67/72,860.52
  6. Step 6: Final answer
    x = 84,000.25

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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.