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Finding the Fourth Proportional to 186,420.78, 257,261.07 and 101,537.58

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Solution

The fourth proportional to 186,420.78, 257,261.07 and 101,537.58 is: 140,122.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,420.78 : 257,261.07 = 101,537.58 : x
  2. Step 2: Convert to fraction form
    186,420.78/257,261.07 = 101,537.58/x
  3. Step 3: Cross multiply
    186,420.78x = 257,261.07 × 101,537.58
  4. Step 4: Simplify right side
    186,420.78x = 26,121,666,476.01
  5. Step 5: Solve for x
    x = 26,121,666,476.01/186,420.78
  6. Step 6: Final answer
    x = 140,122.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.