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Finding the Fourth Proportional to 153,338.63, 211,607.24 and 85,354.11

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Solution

The fourth proportional to 153,338.63, 211,607.24 and 85,354.11 is: 117,788.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,338.63 : 211,607.24 = 85,354.11 : x
  2. Step 2: Convert to fraction form
    153,338.63/211,607.24 = 85,354.11/x
  3. Step 3: Cross multiply
    153,338.63x = 211,607.24 × 85,354.11
  4. Step 4: Simplify right side
    153,338.63x = 18,061,547,212.99
  5. Step 5: Solve for x
    x = 18,061,547,212.99/153,338.63
  6. Step 6: Final answer
    x = 117,788.63

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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.