Home / 85,401.51-128,089.09-29,228.72

Finding the Fourth Proportional to 85,401.51, 128,089.09 and 29,228.72

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Solution

The fourth proportional to 85,401.51, 128,089.09 and 29,228.72 is: 43,838.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,401.51 : 128,089.09 = 29,228.72 : x
  2. Step 2: Convert to fraction form
    85,401.51/128,089.09 = 29,228.72/x
  3. Step 3: Cross multiply
    85,401.51x = 128,089.09 × 29,228.72
  4. Step 4: Simplify right side
    85,401.51x = 3,743,880,146.66
  5. Step 5: Solve for x
    x = 3,743,880,146.66/85,401.51
  6. Step 6: Final answer
    x = 43,838.57

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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.