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Finding the Fourth Proportional to 87,029.53, 120,009.53 and 64,415.95

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Solution

The fourth proportional to 87,029.53, 120,009.53 and 64,415.95 is: 88,826.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,029.53 : 120,009.53 = 64,415.95 : x
  2. Step 2: Convert to fraction form
    87,029.53/120,009.53 = 64,415.95/x
  3. Step 3: Cross multiply
    87,029.53x = 120,009.53 × 64,415.95
  4. Step 4: Simplify right side
    87,029.53x = 7,730,527,745.02
  5. Step 5: Solve for x
    x = 7,730,527,745.02/87,029.53
  6. Step 6: Final answer
    x = 88,826.49

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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.