Home / 85,518.34-128,223.18-75,009.47

Finding the Fourth Proportional to 85,518.34, 128,223.18 and 75,009.47

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Solution

The fourth proportional to 85,518.34, 128,223.18 and 75,009.47 is: 112,466.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,518.34 : 128,223.18 = 75,009.47 : x
  2. Step 2: Convert to fraction form
    85,518.34/128,223.18 = 75,009.47/x
  3. Step 3: Cross multiply
    85,518.34x = 128,223.18 × 75,009.47
  4. Step 4: Simplify right side
    85,518.34x = 9,617,951,757.35
  5. Step 5: Solve for x
    x = 9,617,951,757.35/85,518.34
  6. Step 6: Final answer
    x = 112,466.54

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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.