Home / 103,430.31-155,142.38-28,555.03

Finding the Fourth Proportional to 103,430.31, 155,142.38 and 28,555.03

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Solution

The fourth proportional to 103,430.31, 155,142.38 and 28,555.03 is: 42,831.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.31 : 155,142.38 = 28,555.03 : x
  2. Step 2: Convert to fraction form
    103,430.31/155,142.38 = 28,555.03/x
  3. Step 3: Cross multiply
    103,430.31x = 155,142.38 × 28,555.03
  4. Step 4: Simplify right side
    103,430.31x = 4,430,094,396.68
  5. Step 5: Solve for x
    x = 4,430,094,396.68/103,430.31
  6. Step 6: Final answer
    x = 42,831.68

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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.