Home / 145,721.42-218,243.36-140,670.36

Finding the Fourth Proportional to 145,721.42, 218,243.36 and 140,670.36

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Solution

The fourth proportional to 145,721.42, 218,243.36 and 140,670.36 is: 210,678.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,721.42 : 218,243.36 = 140,670.36 : x
  2. Step 2: Convert to fraction form
    145,721.42/218,243.36 = 140,670.36/x
  3. Step 3: Cross multiply
    145,721.42x = 218,243.36 × 140,670.36
  4. Step 4: Simplify right side
    145,721.42x = 30,700,372,370.49
  5. Step 5: Solve for x
    x = 30,700,372,370.49/145,721.42
  6. Step 6: Final answer
    x = 210,678.52

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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.