Home / 103,430.06-155,142-28,554.78

Finding the Fourth Proportional to 103,430.06, 155,142 and 28,554.78

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Solution

The fourth proportional to 103,430.06, 155,142 and 28,554.78 is: 42,831.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.06 : 155,142 = 28,554.78 : x
  2. Step 2: Convert to fraction form
    103,430.06/155,142 = 28,554.78/x
  3. Step 3: Cross multiply
    103,430.06x = 155,142 × 28,554.78
  4. Step 4: Simplify right side
    103,430.06x = 4,430,044,903.05
  5. Step 5: Solve for x
    x = 4,430,044,903.05/103,430.06
  6. Step 6: Final answer
    x = 42,831.31

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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.