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Finding the Fourth Proportional to 101,781.36, 140,460.53 and 56,457.87

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Solution

The fourth proportional to 101,781.36, 140,460.53 and 56,457.87 is: 77,913.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,781.36 : 140,460.53 = 56,457.87 : x
  2. Step 2: Convert to fraction form
    101,781.36/140,460.53 = 56,457.87/x
  3. Step 3: Cross multiply
    101,781.36x = 140,460.53 × 56,457.87
  4. Step 4: Simplify right side
    101,781.36x = 7,930,102,342.87
  5. Step 5: Solve for x
    x = 7,930,102,342.87/101,781.36
  6. Step 6: Final answer
    x = 77,913.11

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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.