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Finding the Fourth Proportional to 153,591.60, 211,973.58 and 85,614.78

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Solution

The fourth proportional to 153,591.60, 211,973.58 and 85,614.78 is: 118,157.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,591.60 : 211,973.58 = 85,614.78 : x
  2. Step 2: Convert to fraction form
    153,591.60/211,973.58 = 85,614.78/x
  3. Step 3: Cross multiply
    153,591.60x = 211,973.58 × 85,614.78
  4. Step 4: Simplify right side
    153,591.60x = 18,148,071,417.51
  5. Step 5: Solve for x
    x = 18,148,071,417.51/153,591.60
  6. Step 6: Final answer
    x = 118,157.97

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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.