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Finding the Fourth Proportional to 56,918.40, 85,447.80 and 35,858.40

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Solution

The fourth proportional to 56,918.40, 85,447.80 and 35,858.40 is: 53,831.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,918.40 : 85,447.80 = 35,858.40 : x
  2. Step 2: Convert to fraction form
    56,918.40/85,447.80 = 35,858.40/x
  3. Step 3: Cross multiply
    56,918.40x = 85,447.80 × 35,858.40
  4. Step 4: Simplify right side
    56,918.40x = 3,064,021,391.52
  5. Step 5: Solve for x
    x = 3,064,021,391.52/56,918.40
  6. Step 6: Final answer
    x = 53,831.83

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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.