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Finding the Fourth Proportional to 219,646.56, 303,030 and 129,005.40

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Solution

The fourth proportional to 219,646.56, 303,030 and 129,005.40 is: 177,979.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,646.56 : 303,030 = 129,005.40 : x
  2. Step 2: Convert to fraction form
    219,646.56/303,030 = 129,005.40/x
  3. Step 3: Cross multiply
    219,646.56x = 303,030 × 129,005.40
  4. Step 4: Simplify right side
    219,646.56x = 39,092,506,362
  5. Step 5: Solve for x
    x = 39,092,506,362/219,646.56
  6. Step 6: Final answer
    x = 177,979.14

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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.