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Finding the Fourth Proportional to 219,678.52, 329,547.30 and 77,490.40

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Solution

The fourth proportional to 219,678.52, 329,547.30 and 77,490.40 is: 116,246.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,678.52 : 329,547.30 = 77,490.40 : x
  2. Step 2: Convert to fraction form
    219,678.52/329,547.30 = 77,490.40/x
  3. Step 3: Cross multiply
    219,678.52x = 329,547.30 × 77,490.40
  4. Step 4: Simplify right side
    219,678.52x = 25,536,752,095.92
  5. Step 5: Solve for x
    x = 25,536,752,095.92/219,678.52
  6. Step 6: Final answer
    x = 116,246.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.