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Finding the Fourth Proportional to 153,777.51, 212,218.20 and 89,241.78

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Solution

The fourth proportional to 153,777.51, 212,218.20 and 89,241.78 is: 123,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,777.51 : 212,218.20 = 89,241.78 : x
  2. Step 2: Convert to fraction form
    153,777.51/212,218.20 = 89,241.78/x
  3. Step 3: Cross multiply
    153,777.51x = 212,218.20 × 89,241.78
  4. Step 4: Simplify right side
    153,777.51x = 18,938,729,916.40
  5. Step 5: Solve for x
    x = 18,938,729,916.40/153,777.51
  6. Step 6: Final answer
    x = 123,156.70

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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.