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Finding the Fourth Proportional to 76,887.42, 115,230.65 and 39,415.74

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Solution

The fourth proportional to 76,887.42, 115,230.65 and 39,415.74 is: 59,072.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,887.42 : 115,230.65 = 39,415.74 : x
  2. Step 2: Convert to fraction form
    76,887.42/115,230.65 = 39,415.74/x
  3. Step 3: Cross multiply
    76,887.42x = 115,230.65 × 39,415.74
  4. Step 4: Simplify right side
    76,887.42x = 4,541,901,340.43
  5. Step 5: Solve for x
    x = 4,541,901,340.43/76,887.42
  6. Step 6: Final answer
    x = 59,072.10

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1.5x scale

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.