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Finding the Fourth Proportional to 77,730.53, 115,989.58 and 69,352.97

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Solution

The fourth proportional to 77,730.53, 115,989.58 and 69,352.97 is: 103,488.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,730.53 : 115,989.58 = 69,352.97 : x
  2. Step 2: Convert to fraction form
    77,730.53/115,989.58 = 69,352.97/x
  3. Step 3: Cross multiply
    77,730.53x = 115,989.58 × 69,352.97
  4. Step 4: Simplify right side
    77,730.53x = 8,044,221,515.29
  5. Step 5: Solve for x
    x = 8,044,221,515.29/77,730.53
  6. Step 6: Final answer
    x = 103,488.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.