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Finding the Fourth Proportional to 77,063.60, 115,487.40 and 61,295.60

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Solution

The fourth proportional to 77,063.60, 115,487.40 and 61,295.60 is: 91,857.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,063.60 : 115,487.40 = 61,295.60 : x
  2. Step 2: Convert to fraction form
    77,063.60/115,487.40 = 61,295.60/x
  3. Step 3: Cross multiply
    77,063.60x = 115,487.40 × 61,295.60
  4. Step 4: Simplify right side
    77,063.60x = 7,078,869,475.44
  5. Step 5: Solve for x
    x = 7,078,869,475.44/77,063.60
  6. Step 6: Final answer
    x = 91,857.50

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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.