Home / 85,657.35-128,512.31-38,312.27

Finding the Fourth Proportional to 85,657.35, 128,512.31 and 38,312.27

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Solution

The fourth proportional to 85,657.35, 128,512.31 and 38,312.27 is: 57,480.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,657.35 : 128,512.31 = 38,312.27 : x
  2. Step 2: Convert to fraction form
    85,657.35/128,512.31 = 38,312.27/x
  3. Step 3: Cross multiply
    85,657.35x = 128,512.31 × 38,312.27
  4. Step 4: Simplify right side
    85,657.35x = 4,923,598,640.32
  5. Step 5: Solve for x
    x = 4,923,598,640.32/85,657.35
  6. Step 6: Final answer
    x = 57,480.17

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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.