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Finding the Fourth Proportional to 77,124.89, 115,447.48 and 70,584.55

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Solution

The fourth proportional to 77,124.89, 115,447.48 and 70,584.55 is: 105,657.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,124.89 : 115,447.48 = 70,584.55 : x
  2. Step 2: Convert to fraction form
    77,124.89/115,447.48 = 70,584.55/x
  3. Step 3: Cross multiply
    77,124.89x = 115,447.48 × 70,584.55
  4. Step 4: Simplify right side
    77,124.89x = 8,148,807,959.35
  5. Step 5: Solve for x
    x = 8,148,807,959.35/77,124.89
  6. Step 6: Final answer
    x = 105,657.30

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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.