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Finding the Fourth Proportional to 79,688.81, 109,970.56 and 43,878.74

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Solution

The fourth proportional to 79,688.81, 109,970.56 and 43,878.74 is: 60,552.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,688.81 : 109,970.56 = 43,878.74 : x
  2. Step 2: Convert to fraction form
    79,688.81/109,970.56 = 43,878.74/x
  3. Step 3: Cross multiply
    79,688.81x = 109,970.56 × 43,878.74
  4. Step 4: Simplify right side
    79,688.81x = 4,825,369,424.18
  5. Step 5: Solve for x
    x = 4,825,369,424.18/79,688.81
  6. Step 6: Final answer
    x = 60,552.66

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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.