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Finding the Fourth Proportional to 101,393.14, 139,916.70 and 56,069.40

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Solution

The fourth proportional to 101,393.14, 139,916.70 and 56,069.40 is: 77,372.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,393.14 : 139,916.70 = 56,069.40 : x
  2. Step 2: Convert to fraction form
    101,393.14/139,916.70 = 56,069.40/x
  3. Step 3: Cross multiply
    101,393.14x = 139,916.70 × 56,069.40
  4. Step 4: Simplify right side
    101,393.14x = 7,845,045,418.98
  5. Step 5: Solve for x
    x = 7,845,045,418.98/101,393.14
  6. Step 6: Final answer
    x = 77,372.55

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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.