Home / 102,120.12-140,924.96-56,178.76

Finding the Fourth Proportional to 102,120.12, 140,924.96 and 56,178.76

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Solution

The fourth proportional to 102,120.12, 140,924.96 and 56,178.76 is: 77,526.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,120.12 : 140,924.96 = 56,178.76 : x
  2. Step 2: Convert to fraction form
    102,120.12/140,924.96 = 56,178.76/x
  3. Step 3: Cross multiply
    102,120.12x = 140,924.96 × 56,178.76
  4. Step 4: Simplify right side
    102,120.12x = 7,916,989,505.85
  5. Step 5: Solve for x
    x = 7,916,989,505.85/102,120.12
  6. Step 6: Final answer
    x = 77,526.25

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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.