Home / 86,220.40-128,569.16-75,733.33

Finding the Fourth Proportional to 86,220.40, 128,569.16 and 75,733.33

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Solution

The fourth proportional to 86,220.40, 128,569.16 and 75,733.33 is: 112,931.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,220.40 : 128,569.16 = 75,733.33 : x
  2. Step 2: Convert to fraction form
    86,220.40/128,569.16 = 75,733.33/x
  3. Step 3: Cross multiply
    86,220.40x = 128,569.16 × 75,733.33
  4. Step 4: Simplify right side
    86,220.40x = 9,736,970,622.10
  5. Step 5: Solve for x
    x = 9,736,970,622.10/86,220.40
  6. Step 6: Final answer
    x = 112,931.17

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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.