Home / 145,020.86-200,127.94-81,358.50

Finding the Fourth Proportional to 145,020.86, 200,127.94 and 81,358.50

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Solution

The fourth proportional to 145,020.86, 200,127.94 and 81,358.50 is: 112,274.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,020.86 : 200,127.94 = 81,358.50 : x
  2. Step 2: Convert to fraction form
    145,020.86/200,127.94 = 81,358.50/x
  3. Step 3: Cross multiply
    145,020.86x = 200,127.94 × 81,358.50
  4. Step 4: Simplify right side
    145,020.86x = 16,282,108,803.09
  5. Step 5: Solve for x
    x = 16,282,108,803.09/145,020.86
  6. Step 6: Final answer
    x = 112,274.26

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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.