Home / 218,128.37-301,012.80-121,330.13

Finding the Fourth Proportional to 218,128.37, 301,012.80 and 121,330.13

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Solution

The fourth proportional to 218,128.37, 301,012.80 and 121,330.13 is: 167,433.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,128.37 : 301,012.80 = 121,330.13 : x
  2. Step 2: Convert to fraction form
    218,128.37/301,012.80 = 121,330.13/x
  3. Step 3: Cross multiply
    218,128.37x = 301,012.80 × 121,330.13
  4. Step 4: Simplify right side
    218,128.37x = 36,521,922,155.66
  5. Step 5: Solve for x
    x = 36,521,922,155.66/218,128.37
  6. Step 6: Final answer
    x = 167,433.16

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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.