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Finding the Fourth Proportional to 56,387.71, 77,840.85 and 48,700.41

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Solution

The fourth proportional to 56,387.71, 77,840.85 and 48,700.41 is: 67,228.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,387.71 : 77,840.85 = 48,700.41 : x
  2. Step 2: Convert to fraction form
    56,387.71/77,840.85 = 48,700.41/x
  3. Step 3: Cross multiply
    56,387.71x = 77,840.85 × 48,700.41
  4. Step 4: Simplify right side
    56,387.71x = 3,790,880,926.53
  5. Step 5: Solve for x
    x = 3,790,880,926.53/56,387.71
  6. Step 6: Final answer
    x = 67,228.85

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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.