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Finding the Fourth Proportional to 219,297.50, 302,633.10 and 128,655.02

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Solution

The fourth proportional to 219,297.50, 302,633.10 and 128,655.02 is: 177,545.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,297.50 : 302,633.10 = 128,655.02 : x
  2. Step 2: Convert to fraction form
    219,297.50/302,633.10 = 128,655.02/x
  3. Step 3: Cross multiply
    219,297.50x = 302,633.10 × 128,655.02
  4. Step 4: Simplify right side
    219,297.50x = 38,935,266,020.00
  5. Step 5: Solve for x
    x = 38,935,266,020.00/219,297.50
  6. Step 6: Final answer
    x = 177,545.42

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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.