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Finding the Fourth Proportional to 56,440, 77,887.74 and 31,290.04

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Solution

The fourth proportional to 56,440, 77,887.74 and 31,290.04 is: 43,180.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,440 : 77,887.74 = 31,290.04 : x
  2. Step 2: Convert to fraction form
    56,440/77,887.74 = 31,290.04/x
  3. Step 3: Cross multiply
    56,440x = 77,887.74 × 31,290.04
  4. Step 4: Simplify right side
    56,440x = 2,437,110,500.11
  5. Step 5: Solve for x
    x = 2,437,110,500.11/56,440
  6. Step 6: Final answer
    x = 43,180.55

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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.