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Finding the Fourth Proportional to 153,609.84, 211,983.90 and 85,624.92

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Solution

The fourth proportional to 153,609.84, 211,983.90 and 85,624.92 is: 118,163.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,609.84 : 211,983.90 = 85,624.92 : x
  2. Step 2: Convert to fraction form
    153,609.84/211,983.90 = 85,624.92/x
  3. Step 3: Cross multiply
    153,609.84x = 211,983.90 × 85,624.92
  4. Step 4: Simplify right side
    153,609.84x = 18,151,104,478.79
  5. Step 5: Solve for x
    x = 18,151,104,478.79/153,609.84
  6. Step 6: Final answer
    x = 118,163.68

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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.