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Finding the Fourth Proportional to 86,995.68, 120,048.36 and 51,178.77

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Solution

The fourth proportional to 86,995.68, 120,048.36 and 51,178.77 is: 70,623.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,995.68 : 120,048.36 = 51,178.77 : x
  2. Step 2: Convert to fraction form
    86,995.68/120,048.36 = 51,178.77/x
  3. Step 3: Cross multiply
    86,995.68x = 120,048.36 × 51,178.77
  4. Step 4: Simplify right side
    86,995.68x = 6,143,927,899.78
  5. Step 5: Solve for x
    x = 6,143,927,899.78/86,995.68
  6. Step 6: Final answer
    x = 70,623.37

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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.