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Finding the Fourth Proportional to 153,386.71, 211,671.96 and 85,402.21

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Solution

The fourth proportional to 153,386.71, 211,671.96 and 85,402.21 is: 117,854.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,386.71 : 211,671.96 = 85,402.21 : x
  2. Step 2: Convert to fraction form
    153,386.71/211,671.96 = 85,402.21/x
  3. Step 3: Cross multiply
    153,386.71x = 211,671.96 × 85,402.21
  4. Step 4: Simplify right side
    153,386.71x = 18,077,253,179.03
  5. Step 5: Solve for x
    x = 18,077,253,179.03/153,386.71
  6. Step 6: Final answer
    x = 117,854.10

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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.