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Finding the Fourth Proportional to 219,279.80, 328,943.04 and 69,541.40

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Solution

The fourth proportional to 219,279.80, 328,943.04 and 69,541.40 is: 104,319.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,279.80 : 328,943.04 = 69,541.40 : x
  2. Step 2: Convert to fraction form
    219,279.80/328,943.04 = 69,541.40/x
  3. Step 3: Cross multiply
    219,279.80x = 328,943.04 × 69,541.40
  4. Step 4: Simplify right side
    219,279.80x = 22,875,159,521.86
  5. Step 5: Solve for x
    x = 22,875,159,521.86/219,279.80
  6. Step 6: Final answer
    x = 104,319.50

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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.