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Finding the Fourth Proportional to 66,459.66, 99,689.48 and 19,712.13

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Solution

The fourth proportional to 66,459.66, 99,689.48 and 19,712.13 is: 29,568.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,459.66 : 99,689.48 = 19,712.13 : x
  2. Step 2: Convert to fraction form
    66,459.66/99,689.48 = 19,712.13/x
  3. Step 3: Cross multiply
    66,459.66x = 99,689.48 × 19,712.13
  4. Step 4: Simplify right side
    66,459.66x = 1,965,091,989.39
  5. Step 5: Solve for x
    x = 1,965,091,989.39/66,459.66
  6. Step 6: Final answer
    x = 29,568.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.