Home / 219,278.02-302,608.64-128,699.31

Finding the Fourth Proportional to 219,278.02, 302,608.64 and 128,699.31

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Solution

The fourth proportional to 219,278.02, 302,608.64 and 128,699.31 is: 177,607.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,278.02 : 302,608.64 = 128,699.31 : x
  2. Step 2: Convert to fraction form
    219,278.02/302,608.64 = 128,699.31/x
  3. Step 3: Cross multiply
    219,278.02x = 302,608.64 × 128,699.31
  4. Step 4: Simplify right side
    219,278.02x = 38,945,522,524.54
  5. Step 5: Solve for x
    x = 38,945,522,524.54/219,278.02
  6. Step 6: Final answer
    x = 177,607.97

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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.