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Finding the Fourth Proportional to 101,388.36, 139,916.85 and 56,069.39

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Solution

The fourth proportional to 101,388.36, 139,916.85 and 56,069.39 is: 77,376.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,388.36 : 139,916.85 = 56,069.39 : x
  2. Step 2: Convert to fraction form
    101,388.36/139,916.85 = 56,069.39/x
  3. Step 3: Cross multiply
    101,388.36x = 139,916.85 × 56,069.39
  4. Step 4: Simplify right side
    101,388.36x = 7,845,051,730.64
  5. Step 5: Solve for x
    x = 7,845,051,730.64/101,388.36
  6. Step 6: Final answer
    x = 77,376.26

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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.