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Finding the Fourth Proportional to 153,394.40, 211,683.84 and 86,326.40

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Solution

The fourth proportional to 153,394.40, 211,683.84 and 86,326.40 is: 119,130.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,394.40 : 211,683.84 = 86,326.40 : x
  2. Step 2: Convert to fraction form
    153,394.40/211,683.84 = 86,326.40/x
  3. Step 3: Cross multiply
    153,394.40x = 211,683.84 × 86,326.40
  4. Step 4: Simplify right side
    153,394.40x = 18,273,903,845.38
  5. Step 5: Solve for x
    x = 18,273,903,845.38/153,394.40
  6. Step 6: Final answer
    x = 119,130.19

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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.