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Finding the Fourth Proportional to 111,903.12, 154,428.12 and 61,602.12

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Solution

The fourth proportional to 111,903.12, 154,428.12 and 61,602.12 is: 85,011.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,903.12 : 154,428.12 = 61,602.12 : x
  2. Step 2: Convert to fraction form
    111,903.12/154,428.12 = 61,602.12/x
  3. Step 3: Cross multiply
    111,903.12x = 154,428.12 × 61,602.12
  4. Step 4: Simplify right side
    111,903.12x = 9,513,099,579.61
  5. Step 5: Solve for x
    x = 9,513,099,579.61/111,903.12
  6. Step 6: Final answer
    x = 85,011.92

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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.