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Finding the Fourth Proportional to 92,820.52, 128,081.41 and 51,987.21

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Solution

The fourth proportional to 92,820.52, 128,081.41 and 51,987.21 is: 71,736.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,820.52 : 128,081.41 = 51,987.21 : x
  2. Step 2: Convert to fraction form
    92,820.52/128,081.41 = 51,987.21/x
  3. Step 3: Cross multiply
    92,820.52x = 128,081.41 × 51,987.21
  4. Step 4: Simplify right side
    92,820.52x = 6,658,595,158.77
  5. Step 5: Solve for x
    x = 6,658,595,158.77/92,820.52
  6. Step 6: Final answer
    x = 71,736.24

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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.