Home / 219,129.29-302,400.60-128,538.89

Finding the Fourth Proportional to 219,129.29, 302,400.60 and 128,538.89

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Solution

The fourth proportional to 219,129.29, 302,400.60 and 128,538.89 is: 177,384.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,129.29 : 302,400.60 = 128,538.89 : x
  2. Step 2: Convert to fraction form
    219,129.29/302,400.60 = 128,538.89/x
  3. Step 3: Cross multiply
    219,129.29x = 302,400.60 × 128,538.89
  4. Step 4: Simplify right side
    219,129.29x = 38,870,237,459.33
  5. Step 5: Solve for x
    x = 38,870,237,459.33/219,129.29
  6. Step 6: Final answer
    x = 177,384.95

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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.