Home / 145,089.57-200,243.16-81,430.86

Finding the Fourth Proportional to 145,089.57, 200,243.16 and 81,430.86

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Solution

The fourth proportional to 145,089.57, 200,243.16 and 81,430.86 is: 112,385.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,089.57 : 200,243.16 = 81,430.86 : x
  2. Step 2: Convert to fraction form
    145,089.57/200,243.16 = 81,430.86/x
  3. Step 3: Cross multiply
    145,089.57x = 200,243.16 × 81,430.86
  4. Step 4: Simplify right side
    145,089.57x = 16,305,972,727.92
  5. Step 5: Solve for x
    x = 16,305,972,727.92/145,089.57
  6. Step 6: Final answer
    x = 112,385.56

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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.