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Finding the Fourth Proportional to 57,090, 85,649.28 and 21,551.25

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Solution

The fourth proportional to 57,090, 85,649.28 and 21,551.25 is: 32,332.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,090 : 85,649.28 = 21,551.25 : x
  2. Step 2: Convert to fraction form
    57,090/85,649.28 = 21,551.25/x
  3. Step 3: Cross multiply
    57,090x = 85,649.28 × 21,551.25
  4. Step 4: Simplify right side
    57,090x = 1,845,849,045.60
  5. Step 5: Solve for x
    x = 1,845,849,045.60/57,090
  6. Step 6: Final answer
    x = 32,332.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.