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Finding the Fourth Proportional to 191,143.80, 286,715.70 and 66,484.80

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Solution

The fourth proportional to 191,143.80, 286,715.70 and 66,484.80 is: 99,727.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,143.80 : 286,715.70 = 66,484.80 : x
  2. Step 2: Convert to fraction form
    191,143.80/286,715.70 = 66,484.80/x
  3. Step 3: Cross multiply
    191,143.80x = 286,715.70 × 66,484.80
  4. Step 4: Simplify right side
    191,143.80x = 19,062,235,971.36
  5. Step 5: Solve for x
    x = 19,062,235,971.36/191,143.80
  6. Step 6: Final answer
    x = 99,727.20

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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.