Home / 115,637.15-159,520.81-77,398.30

Finding the Fourth Proportional to 115,637.15, 159,520.81 and 77,398.30

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Solution

The fourth proportional to 115,637.15, 159,520.81 and 77,398.30 is: 106,770.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,637.15 : 159,520.81 = 77,398.30 : x
  2. Step 2: Convert to fraction form
    115,637.15/159,520.81 = 77,398.30/x
  3. Step 3: Cross multiply
    115,637.15x = 159,520.81 × 77,398.30
  4. Step 4: Simplify right side
    115,637.15x = 12,346,639,508.62
  5. Step 5: Solve for x
    x = 12,346,639,508.62/115,637.15
  6. Step 6: Final answer
    x = 106,770.53

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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.