Home / 216,923.78-299,351.76-121,430.36

Finding the Fourth Proportional to 216,923.78, 299,351.76 and 121,430.36

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Solution

The fourth proportional to 216,923.78, 299,351.76 and 121,430.36 is: 167,572.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,923.78 : 299,351.76 = 121,430.36 : x
  2. Step 2: Convert to fraction form
    216,923.78/299,351.76 = 121,430.36/x
  3. Step 3: Cross multiply
    216,923.78x = 299,351.76 × 121,430.36
  4. Step 4: Simplify right side
    216,923.78x = 36,350,391,983.43
  5. Step 5: Solve for x
    x = 36,350,391,983.43/216,923.78
  6. Step 6: Final answer
    x = 167,572.19

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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.