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Finding the Fourth Proportional to 153,353.50, 211,507.93 and 99,655.76

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Solution

The fourth proportional to 153,353.50, 211,507.93 and 99,655.76 is: 137,447.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,353.50 : 211,507.93 = 99,655.76 : x
  2. Step 2: Convert to fraction form
    153,353.50/211,507.93 = 99,655.76/x
  3. Step 3: Cross multiply
    153,353.50x = 211,507.93 × 99,655.76
  4. Step 4: Simplify right side
    153,353.50x = 21,077,983,789.81
  5. Step 5: Solve for x
    x = 21,077,983,789.81/153,353.50
  6. Step 6: Final answer
    x = 137,447.04

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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.