Home / 219,048.12-302,351.04-128,423.76

Finding the Fourth Proportional to 219,048.12, 302,351.04 and 128,423.76

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Solution

The fourth proportional to 219,048.12, 302,351.04 and 128,423.76 is: 177,262.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,048.12 : 302,351.04 = 128,423.76 : x
  2. Step 2: Convert to fraction form
    219,048.12/302,351.04 = 128,423.76/x
  3. Step 3: Cross multiply
    219,048.12x = 302,351.04 × 128,423.76
  4. Step 4: Simplify right side
    219,048.12x = 38,829,057,396.71
  5. Step 5: Solve for x
    x = 38,829,057,396.71/219,048.12
  6. Step 6: Final answer
    x = 177,262.68

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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.