Home / 218,969.43-302,178.02-128,307.35

Finding the Fourth Proportional to 218,969.43, 302,178.02 and 128,307.35

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Solution

The fourth proportional to 218,969.43, 302,178.02 and 128,307.35 is: 177,064.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,969.43 : 302,178.02 = 128,307.35 : x
  2. Step 2: Convert to fraction form
    218,969.43/302,178.02 = 128,307.35/x
  3. Step 3: Cross multiply
    218,969.43x = 302,178.02 × 128,307.35
  4. Step 4: Simplify right side
    218,969.43x = 38,771,658,822.02
  5. Step 5: Solve for x
    x = 38,771,658,822.02/218,969.43
  6. Step 6: Final answer
    x = 177,064.25

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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.