Home / 86,233.28-128,588.38-75,746.21

Finding the Fourth Proportional to 86,233.28, 128,588.38 and 75,746.21

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Solution

The fourth proportional to 86,233.28, 128,588.38 and 75,746.21 is: 112,950.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,233.28 : 128,588.38 = 75,746.21 : x
  2. Step 2: Convert to fraction form
    86,233.28/128,588.38 = 75,746.21/x
  3. Step 3: Cross multiply
    86,233.28x = 128,588.38 × 75,746.21
  4. Step 4: Simplify right side
    86,233.28x = 9,740,081,602.73
  5. Step 5: Solve for x
    x = 9,740,081,602.73/86,233.28
  6. Step 6: Final answer
    x = 112,950.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.