Home / 85,667.94-128,532.65-38,279.07

Finding the Fourth Proportional to 85,667.94, 128,532.65 and 38,279.07

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Solution

The fourth proportional to 85,667.94, 128,532.65 and 38,279.07 is: 57,432.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,667.94 : 128,532.65 = 38,279.07 : x
  2. Step 2: Convert to fraction form
    85,667.94/128,532.65 = 38,279.07/x
  3. Step 3: Cross multiply
    85,667.94x = 128,532.65 × 38,279.07
  4. Step 4: Simplify right side
    85,667.94x = 4,920,110,115.24
  5. Step 5: Solve for x
    x = 4,920,110,115.24/85,667.94
  6. Step 6: Final answer
    x = 57,432.34

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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.