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Finding the Fourth Proportional to 100,969.44, 139,332.84 and 58,541.76

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Solution

The fourth proportional to 100,969.44, 139,332.84 and 58,541.76 is: 80,784.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,969.44 : 139,332.84 = 58,541.76 : x
  2. Step 2: Convert to fraction form
    100,969.44/139,332.84 = 58,541.76/x
  3. Step 3: Cross multiply
    100,969.44x = 139,332.84 × 58,541.76
  4. Step 4: Simplify right side
    100,969.44x = 8,156,789,679.40
  5. Step 5: Solve for x
    x = 8,156,789,679.40/100,969.44
  6. Step 6: Final answer
    x = 80,784.74

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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.