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Finding the Fourth Proportional to 55,903.88, 77,148.75 and 30,411.68

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Solution

The fourth proportional to 55,903.88, 77,148.75 and 30,411.68 is: 41,968.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,903.88 : 77,148.75 = 30,411.68 : x
  2. Step 2: Convert to fraction form
    55,903.88/77,148.75 = 30,411.68/x
  3. Step 3: Cross multiply
    55,903.88x = 77,148.75 × 30,411.68
  4. Step 4: Simplify right side
    55,903.88x = 2,346,222,711.66
  5. Step 5: Solve for x
    x = 2,346,222,711.66/55,903.88
  6. Step 6: Final answer
    x = 41,968.87

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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.