Home / 85,945.76-128,870-26,763.92

Finding the Fourth Proportional to 85,945.76, 128,870 and 26,763.92

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Solution

The fourth proportional to 85,945.76, 128,870 and 26,763.92 is: 40,130.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,945.76 : 128,870 = 26,763.92 : x
  2. Step 2: Convert to fraction form
    85,945.76/128,870 = 26,763.92/x
  3. Step 3: Cross multiply
    85,945.76x = 128,870 × 26,763.92
  4. Step 4: Simplify right side
    85,945.76x = 3,449,066,370.40
  5. Step 5: Solve for x
    x = 3,449,066,370.40/85,945.76
  6. Step 6: Final answer
    x = 40,130.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.