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Finding the Fourth Proportional to 77,188.60, 115,698.43 and 39,750.94

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Solution

The fourth proportional to 77,188.60, 115,698.43 and 39,750.94 is: 59,582.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,188.60 : 115,698.43 = 39,750.94 : x
  2. Step 2: Convert to fraction form
    77,188.60/115,698.43 = 39,750.94/x
  3. Step 3: Cross multiply
    77,188.60x = 115,698.43 × 39,750.94
  4. Step 4: Simplify right side
    77,188.60x = 4,599,121,349.02
  5. Step 5: Solve for x
    x = 4,599,121,349.02/77,188.60
  6. Step 6: Final answer
    x = 59,582.91

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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.