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Finding the Fourth Proportional to 56,393.28, 77,645.64 and 47,877.72

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Solution

The fourth proportional to 56,393.28, 77,645.64 and 47,877.72 is: 65,920.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,393.28 : 77,645.64 = 47,877.72 : x
  2. Step 2: Convert to fraction form
    56,393.28/77,645.64 = 47,877.72/x
  3. Step 3: Cross multiply
    56,393.28x = 77,645.64 × 47,877.72
  4. Step 4: Simplify right side
    56,393.28x = 3,717,496,211.14
  5. Step 5: Solve for x
    x = 3,717,496,211.14/56,393.28
  6. Step 6: Final answer
    x = 65,920.91

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1.5x scale

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.