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Finding the Fourth Proportional to 99,018.40, 136,609.49 and 65,045.18

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Solution

The fourth proportional to 99,018.40, 136,609.49 and 65,045.18 is: 89,738.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,018.40 : 136,609.49 = 65,045.18 : x
  2. Step 2: Convert to fraction form
    99,018.40/136,609.49 = 65,045.18/x
  3. Step 3: Cross multiply
    99,018.40x = 136,609.49 × 65,045.18
  4. Step 4: Simplify right side
    99,018.40x = 8,885,788,866.76
  5. Step 5: Solve for x
    x = 8,885,788,866.76/99,018.40
  6. Step 6: Final answer
    x = 89,738.76

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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.