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Finding the Fourth Proportional to 61,172.70, 84,421.35 and 34,313.82

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Solution

The fourth proportional to 61,172.70, 84,421.35 and 34,313.82 is: 47,354.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,172.70 : 84,421.35 = 34,313.82 : x
  2. Step 2: Convert to fraction form
    61,172.70/84,421.35 = 34,313.82/x
  3. Step 3: Cross multiply
    61,172.70x = 84,421.35 × 34,313.82
  4. Step 4: Simplify right side
    61,172.70x = 2,896,819,008.06
  5. Step 5: Solve for x
    x = 2,896,819,008.06/61,172.70
  6. Step 6: Final answer
    x = 47,354.77

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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.