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Finding the Fourth Proportional to 85,752.74, 128,673 and 40,824.92

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Solution

The fourth proportional to 85,752.74, 128,673 and 40,824.92 is: 61,258.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,752.74 : 128,673 = 40,824.92 : x
  2. Step 2: Convert to fraction form
    85,752.74/128,673 = 40,824.92/x
  3. Step 3: Cross multiply
    85,752.74x = 128,673 × 40,824.92
  4. Step 4: Simplify right side
    85,752.74x = 5,253,064,931.16
  5. Step 5: Solve for x
    x = 5,253,064,931.16/85,752.74
  6. Step 6: Final answer
    x = 61,258.28

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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.