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Finding the Fourth Proportional to 78,756.63, 108,681.10 and 44,769.58

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Solution

The fourth proportional to 78,756.63, 108,681.10 and 44,769.58 is: 61,780.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,756.63 : 108,681.10 = 44,769.58 : x
  2. Step 2: Convert to fraction form
    78,756.63/108,681.10 = 44,769.58/x
  3. Step 3: Cross multiply
    78,756.63x = 108,681.10 × 44,769.58
  4. Step 4: Simplify right side
    78,756.63x = 4,865,607,200.94
  5. Step 5: Solve for x
    x = 4,865,607,200.94/78,756.63
  6. Step 6: Final answer
    x = 61,780.29

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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.