Home / 85,940.71-128,914.56-40,938.93

Finding the Fourth Proportional to 85,940.71, 128,914.56 and 40,938.93

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Solution

The fourth proportional to 85,940.71, 128,914.56 and 40,938.93 is: 61,410.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,940.71 : 128,914.56 = 40,938.93 : x
  2. Step 2: Convert to fraction form
    85,940.71/128,914.56 = 40,938.93/x
  3. Step 3: Cross multiply
    85,940.71x = 128,914.56 × 40,938.93
  4. Step 4: Simplify right side
    85,940.71x = 5,277,623,943.13
  5. Step 5: Solve for x
    x = 5,277,623,943.13/85,940.71
  6. Step 6: Final answer
    x = 61,410.06

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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.