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Finding the Fourth Proportional to 61,638.98, 85,064.81 and 34,780.91

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Solution

The fourth proportional to 61,638.98, 85,064.81 and 34,780.91 is: 47,999.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,638.98 : 85,064.81 = 34,780.91 : x
  2. Step 2: Convert to fraction form
    61,638.98/85,064.81 = 34,780.91/x
  3. Step 3: Cross multiply
    61,638.98x = 85,064.81 × 34,780.91
  4. Step 4: Simplify right side
    61,638.98x = 2,958,630,901.55
  5. Step 5: Solve for x
    x = 2,958,630,901.55/61,638.98
  6. Step 6: Final answer
    x = 47,999.35

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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.