Home / 205,109.10-307,663.65-145,622.70

Finding the Fourth Proportional to 205,109.10, 307,663.65 and 145,622.70

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Solution

The fourth proportional to 205,109.10, 307,663.65 and 145,622.70 is: 218,434.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,109.10 : 307,663.65 = 145,622.70 : x
  2. Step 2: Convert to fraction form
    205,109.10/307,663.65 = 145,622.70/x
  3. Step 3: Cross multiply
    205,109.10x = 307,663.65 × 145,622.70
  4. Step 4: Simplify right side
    205,109.10x = 44,802,811,404.86
  5. Step 5: Solve for x
    x = 44,802,811,404.86/205,109.10
  6. Step 6: Final answer
    x = 218,434.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.