Home / 85,472.20-128,209.95-26,307.81

Finding the Fourth Proportional to 85,472.20, 128,209.95 and 26,307.81

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Solution

The fourth proportional to 85,472.20, 128,209.95 and 26,307.81 is: 39,462.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,472.20 : 128,209.95 = 26,307.81 : x
  2. Step 2: Convert to fraction form
    85,472.20/128,209.95 = 26,307.81/x
  3. Step 3: Cross multiply
    85,472.20x = 128,209.95 × 26,307.81
  4. Step 4: Simplify right side
    85,472.20x = 3,372,922,232.12
  5. Step 5: Solve for x
    x = 3,372,922,232.12/85,472.20
  6. Step 6: Final answer
    x = 39,462.21

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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.