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Finding the Fourth Proportional to 104,187, 143,778.18 and 56,440.68

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Solution

The fourth proportional to 104,187, 143,778.18 and 56,440.68 is: 77,888.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,187 : 143,778.18 = 56,440.68 : x
  2. Step 2: Convert to fraction form
    104,187/143,778.18 = 56,440.68/x
  3. Step 3: Cross multiply
    104,187x = 143,778.18 × 56,440.68
  4. Step 4: Simplify right side
    104,187x = 8,114,938,248.36
  5. Step 5: Solve for x
    x = 8,114,938,248.36/104,187
  6. Step 6: Final answer
    x = 77,888.20

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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.