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Finding the Fourth Proportional to 153,535.76, 211,878.84 and 85,555.64

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Solution

The fourth proportional to 153,535.76, 211,878.84 and 85,555.64 is: 118,066.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,535.76 : 211,878.84 = 85,555.64 : x
  2. Step 2: Convert to fraction form
    153,535.76/211,878.84 = 85,555.64/x
  3. Step 3: Cross multiply
    153,535.76x = 211,878.84 × 85,555.64
  4. Step 4: Simplify right side
    153,535.76x = 18,127,429,758.66
  5. Step 5: Solve for x
    x = 18,127,429,758.66/153,535.76
  6. Step 6: Final answer
    x = 118,066.50

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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.