Home / 87,907.92-121,312.63-47,621.64

Finding the Fourth Proportional to 87,907.92, 121,312.63 and 47,621.64

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Solution

The fourth proportional to 87,907.92, 121,312.63 and 47,621.64 is: 65,717.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,907.92 : 121,312.63 = 47,621.64 : x
  2. Step 2: Convert to fraction form
    87,907.92/121,312.63 = 47,621.64/x
  3. Step 3: Cross multiply
    87,907.92x = 121,312.63 × 47,621.64
  4. Step 4: Simplify right side
    87,907.92x = 5,777,105,997.92
  5. Step 5: Solve for x
    x = 5,777,105,997.92/87,907.92
  6. Step 6: Final answer
    x = 65,717.70

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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.