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Finding the Fourth Proportional to 112,043.90, 156,978.10 and 112,043.90

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Solution

The fourth proportional to 112,043.90, 156,978.10 and 112,043.90 is: 156,978.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,043.90 : 156,978.10 = 112,043.90 : x
  2. Step 2: Convert to fraction form
    112,043.90/156,978.10 = 112,043.90/x
  3. Step 3: Cross multiply
    112,043.90x = 156,978.10 × 112,043.90
  4. Step 4: Simplify right side
    112,043.90x = 17,588,438,538.59
  5. Step 5: Solve for x
    x = 17,588,438,538.59/112,043.90
  6. Step 6: Final answer
    x = 156,978.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.