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Finding the Fourth Proportional to 89,643.51, 123,703.45 and 49,349.50

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Solution

The fourth proportional to 89,643.51, 123,703.45 and 49,349.50 is: 68,099.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,643.51 : 123,703.45 = 49,349.50 : x
  2. Step 2: Convert to fraction form
    89,643.51/123,703.45 = 49,349.50/x
  3. Step 3: Cross multiply
    89,643.51x = 123,703.45 × 49,349.50
  4. Step 4: Simplify right side
    89,643.51x = 6,104,703,946.57
  5. Step 5: Solve for x
    x = 6,104,703,946.57/89,643.51
  6. Step 6: Final answer
    x = 68,099.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.