Home / 120,388.24-166,091.16-77,970.16

Finding the Fourth Proportional to 120,388.24, 166,091.16 and 77,970.16

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Solution

The fourth proportional to 120,388.24, 166,091.16 and 77,970.16 is: 107,569.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,388.24 : 166,091.16 = 77,970.16 : x
  2. Step 2: Convert to fraction form
    120,388.24/166,091.16 = 77,970.16/x
  3. Step 3: Cross multiply
    120,388.24x = 166,091.16 × 77,970.16
  4. Step 4: Simplify right side
    120,388.24x = 12,950,154,319.79
  5. Step 5: Solve for x
    x = 12,950,154,319.79/120,388.24
  6. Step 6: Final answer
    x = 107,569.93

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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.