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Finding the Fourth Proportional to 219,368.07, 328,984.07 and 79,108.47

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Solution

The fourth proportional to 219,368.07, 328,984.07 and 79,108.47 is: 118,638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,368.07 : 328,984.07 = 79,108.47 : x
  2. Step 2: Convert to fraction form
    219,368.07/328,984.07 = 79,108.47/x
  3. Step 3: Cross multiply
    219,368.07x = 328,984.07 × 79,108.47
  4. Step 4: Simplify right side
    219,368.07x = 26,025,426,036.53
  5. Step 5: Solve for x
    x = 26,025,426,036.53/219,368.07
  6. Step 6: Final answer
    x = 118,638.17

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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.