Home / 218,970.06-302,178.88-128,307.97

Finding the Fourth Proportional to 218,970.06, 302,178.88 and 128,307.97

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Solution

The fourth proportional to 218,970.06, 302,178.88 and 128,307.97 is: 177,065.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,970.06 : 302,178.88 = 128,307.97 : x
  2. Step 2: Convert to fraction form
    218,970.06/302,178.88 = 128,307.97/x
  3. Step 3: Cross multiply
    218,970.06x = 302,178.88 × 128,307.97
  4. Step 4: Simplify right side
    218,970.06x = 38,771,958,669.67
  5. Step 5: Solve for x
    x = 38,771,958,669.67/218,970.06
  6. Step 6: Final answer
    x = 177,065.11

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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.