Home / 219,175.20-302,365.76-128,485.20

Finding the Fourth Proportional to 219,175.20, 302,365.76 and 128,485.20

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Solution

The fourth proportional to 219,175.20, 302,365.76 and 128,485.20 is: 177,253.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,175.20 : 302,365.76 = 128,485.20 : x
  2. Step 2: Convert to fraction form
    219,175.20/302,365.76 = 128,485.20/x
  3. Step 3: Cross multiply
    219,175.20x = 302,365.76 × 128,485.20
  4. Step 4: Simplify right side
    219,175.20x = 38,849,525,146.75
  5. Step 5: Solve for x
    x = 38,849,525,146.75/219,175.20
  6. Step 6: Final answer
    x = 177,253.29

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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.