Home / 218,856.52-302,045.20-128,288.56

Finding the Fourth Proportional to 218,856.52, 302,045.20 and 128,288.56

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Solution

The fourth proportional to 218,856.52, 302,045.20 and 128,288.56 is: 177,051.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,856.52 : 302,045.20 = 128,288.56 : x
  2. Step 2: Convert to fraction form
    218,856.52/302,045.20 = 128,288.56/x
  3. Step 3: Cross multiply
    218,856.52x = 302,045.20 × 128,288.56
  4. Step 4: Simplify right side
    218,856.52x = 38,748,943,762.91
  5. Step 5: Solve for x
    x = 38,748,943,762.91/218,856.52
  6. Step 6: Final answer
    x = 177,051.81

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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.