Home / 85,612.26-128,476.70-30,208.26

Finding the Fourth Proportional to 85,612.26, 128,476.70 and 30,208.26

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Solution

The fourth proportional to 85,612.26, 128,476.70 and 30,208.26 is: 45,332.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,612.26 : 128,476.70 = 30,208.26 : x
  2. Step 2: Convert to fraction form
    85,612.26/128,476.70 = 30,208.26/x
  3. Step 3: Cross multiply
    85,612.26x = 128,476.70 × 30,208.26
  4. Step 4: Simplify right side
    85,612.26x = 3,881,057,557.54
  5. Step 5: Solve for x
    x = 3,881,057,557.54/85,612.26
  6. Step 6: Final answer
    x = 45,332.96

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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.