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Finding the Fourth Proportional to 128,543.04, 192,479.04 and 103,446

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Solution

The fourth proportional to 128,543.04, 192,479.04 and 103,446 is: 154,898.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,543.04 : 192,479.04 = 103,446 : x
  2. Step 2: Convert to fraction form
    128,543.04/192,479.04 = 103,446/x
  3. Step 3: Cross multiply
    128,543.04x = 192,479.04 × 103,446
  4. Step 4: Simplify right side
    128,543.04x = 19,911,186,771.84
  5. Step 5: Solve for x
    x = 19,911,186,771.84/128,543.04
  6. Step 6: Final answer
    x = 154,898.99

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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.