Home / 219,420.36-302,784.24-128,779.92

Finding the Fourth Proportional to 219,420.36, 302,784.24 and 128,779.92

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Solution

The fourth proportional to 219,420.36, 302,784.24 and 128,779.92 is: 177,706.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,420.36 : 302,784.24 = 128,779.92 : x
  2. Step 2: Convert to fraction form
    219,420.36/302,784.24 = 128,779.92/x
  3. Step 3: Cross multiply
    219,420.36x = 302,784.24 × 128,779.92
  4. Step 4: Simplify right side
    219,420.36x = 38,992,530,204.46
  5. Step 5: Solve for x
    x = 38,992,530,204.46/219,420.36
  6. Step 6: Final answer
    x = 177,706.98

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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.