Home / 218,930.19-302,153.64-128,322.24

Finding the Fourth Proportional to 218,930.19, 302,153.64 and 128,322.24

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Solution

The fourth proportional to 218,930.19, 302,153.64 and 128,322.24 is: 177,102.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,930.19 : 302,153.64 = 128,322.24 : x
  2. Step 2: Convert to fraction form
    218,930.19/302,153.64 = 128,322.24/x
  3. Step 3: Cross multiply
    218,930.19x = 302,153.64 × 128,322.24
  4. Step 4: Simplify right side
    218,930.19x = 38,773,031,908.95
  5. Step 5: Solve for x
    x = 38,773,031,908.95/218,930.19
  6. Step 6: Final answer
    x = 177,102.26

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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.