Home / 85,518.47-128,223.36-75,009.59

Finding the Fourth Proportional to 85,518.47, 128,223.36 and 75,009.59

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Solution

The fourth proportional to 85,518.47, 128,223.36 and 75,009.59 is: 112,466.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,518.47 : 128,223.36 = 75,009.59 : x
  2. Step 2: Convert to fraction form
    85,518.47/128,223.36 = 75,009.59/x
  3. Step 3: Cross multiply
    85,518.47x = 128,223.36 × 75,009.59
  4. Step 4: Simplify right side
    85,518.47x = 9,617,981,528.99
  5. Step 5: Solve for x
    x = 9,617,981,528.99/85,518.47
  6. Step 6: Final answer
    x = 112,466.72

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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.