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Finding the Fourth Proportional to 56,388.93, 77,639.19 and 47,874.21

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Solution

The fourth proportional to 56,388.93, 77,639.19 and 47,874.21 is: 65,915.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,388.93 : 77,639.19 = 47,874.21 : x
  2. Step 2: Convert to fraction form
    56,388.93/77,639.19 = 47,874.21/x
  3. Step 3: Cross multiply
    56,388.93x = 77,639.19 × 47,874.21
  4. Step 4: Simplify right side
    56,388.93x = 3,716,914,886.29
  5. Step 5: Solve for x
    x = 3,716,914,886.29/56,388.93
  6. Step 6: Final answer
    x = 65,915.68

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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.