Home / 120,210.77-165,835-77,782.97

Finding the Fourth Proportional to 120,210.77, 165,835 and 77,782.97

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Solution

The fourth proportional to 120,210.77, 165,835 and 77,782.97 is: 107,304.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,210.77 : 165,835 = 77,782.97 : x
  2. Step 2: Convert to fraction form
    120,210.77/165,835 = 77,782.97/x
  3. Step 3: Cross multiply
    120,210.77x = 165,835 × 77,782.97
  4. Step 4: Simplify right side
    120,210.77x = 12,899,138,829.95
  5. Step 5: Solve for x
    x = 12,899,138,829.95/120,210.77
  6. Step 6: Final answer
    x = 107,304.35

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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.