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Finding the Fourth Proportional to 75,287.88, 103,893.98 and 45,090

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Solution

The fourth proportional to 75,287.88, 103,893.98 and 45,090 is: 62,222.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,287.88 : 103,893.98 = 45,090 : x
  2. Step 2: Convert to fraction form
    75,287.88/103,893.98 = 45,090/x
  3. Step 3: Cross multiply
    75,287.88x = 103,893.98 × 45,090
  4. Step 4: Simplify right side
    75,287.88x = 4,684,579,332.75
  5. Step 5: Solve for x
    x = 4,684,579,332.75/75,287.88
  6. Step 6: Final answer
    x = 62,222.22

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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.