Home / 219,220.18-302,503.80-128,559.47

Finding the Fourth Proportional to 219,220.18, 302,503.80 and 128,559.47

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Solution

The fourth proportional to 219,220.18, 302,503.80 and 128,559.47 is: 177,400.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,220.18 : 302,503.80 = 128,559.47 : x
  2. Step 2: Convert to fraction form
    219,220.18/302,503.80 = 128,559.47/x
  3. Step 3: Cross multiply
    219,220.18x = 302,503.80 × 128,559.47
  4. Step 4: Simplify right side
    219,220.18x = 38,889,728,200.99
  5. Step 5: Solve for x
    x = 38,889,728,200.99/219,220.18
  6. Step 6: Final answer
    x = 177,400.31

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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.