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Finding the Fourth Proportional to 66,459.60, 99,655.20 and 19,706.40

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Solution

The fourth proportional to 66,459.60, 99,655.20 and 19,706.40 is: 29,549.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,459.60 : 99,655.20 = 19,706.40 : x
  2. Step 2: Convert to fraction form
    66,459.60/99,655.20 = 19,706.40/x
  3. Step 3: Cross multiply
    66,459.60x = 99,655.20 × 19,706.40
  4. Step 4: Simplify right side
    66,459.60x = 1,963,845,233.28
  5. Step 5: Solve for x
    x = 1,963,845,233.28/66,459.60
  6. Step 6: Final answer
    x = 29,549.46

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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.