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Finding the Fourth Proportional to 61,981, 85,534.36 and 33,686.76

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Solution

The fourth proportional to 61,981, 85,534.36 and 33,686.76 is: 46,488.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,981 : 85,534.36 = 33,686.76 : x
  2. Step 2: Convert to fraction form
    61,981/85,534.36 = 33,686.76/x
  3. Step 3: Cross multiply
    61,981x = 85,534.36 × 33,686.76
  4. Step 4: Simplify right side
    61,981x = 2,881,375,457.07
  5. Step 5: Solve for x
    x = 2,881,375,457.07/61,981
  6. Step 6: Final answer
    x = 46,488.04

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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.