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Finding the Fourth Proportional to 84,430.66, 126,479.55 and 68,653.50

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Solution

The fourth proportional to 84,430.66, 126,479.55 and 68,653.50 is: 102,844.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,430.66 : 126,479.55 = 68,653.50 : x
  2. Step 2: Convert to fraction form
    84,430.66/126,479.55 = 68,653.50/x
  3. Step 3: Cross multiply
    84,430.66x = 126,479.55 × 68,653.50
  4. Step 4: Simplify right side
    84,430.66x = 8,683,263,054.18
  5. Step 5: Solve for x
    x = 8,683,263,054.18/84,430.66
  6. Step 6: Final answer
    x = 102,844.91

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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.