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Finding the Fourth Proportional to 153,877.59, 212,361.75 and 85,907.93

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Solution

The fourth proportional to 153,877.59, 212,361.75 and 85,907.93 is: 118,558.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,877.59 : 212,361.75 = 85,907.93 : x
  2. Step 2: Convert to fraction form
    153,877.59/212,361.75 = 85,907.93/x
  3. Step 3: Cross multiply
    153,877.59x = 212,361.75 × 85,907.93
  4. Step 4: Simplify right side
    153,877.59x = 18,243,557,291.87
  5. Step 5: Solve for x
    x = 18,243,557,291.87/153,877.59
  6. Step 6: Final answer
    x = 118,558.90

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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.