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Finding the Fourth Proportional to 78,622.61, 108,470.70 and 44,611.40

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Solution

The fourth proportional to 78,622.61, 108,470.70 and 44,611.40 is: 61,547.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,622.61 : 108,470.70 = 44,611.40 : x
  2. Step 2: Convert to fraction form
    78,622.61/108,470.70 = 44,611.40/x
  3. Step 3: Cross multiply
    78,622.61x = 108,470.70 × 44,611.40
  4. Step 4: Simplify right side
    78,622.61x = 4,839,029,243.63
  5. Step 5: Solve for x
    x = 4,839,029,243.63/78,622.61
  6. Step 6: Final answer
    x = 61,547.56

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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.