Home / 87,118.08-120,178.64-56,921.08

Finding the Fourth Proportional to 87,118.08, 120,178.64 and 56,921.08

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Solution

The fourth proportional to 87,118.08, 120,178.64 and 56,921.08 is: 78,522.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,118.08 : 120,178.64 = 56,921.08 : x
  2. Step 2: Convert to fraction form
    87,118.08/120,178.64 = 56,921.08/x
  3. Step 3: Cross multiply
    87,118.08x = 120,178.64 × 56,921.08
  4. Step 4: Simplify right side
    87,118.08x = 6,840,697,728.74
  5. Step 5: Solve for x
    x = 6,840,697,728.74/87,118.08
  6. Step 6: Final answer
    x = 78,522.13

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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.