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Finding the Fourth Proportional to 103,875.79, 155,690.64 and 47,668.52

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Solution

The fourth proportional to 103,875.79, 155,690.64 and 47,668.52 is: 71,446.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,875.79 : 155,690.64 = 47,668.52 : x
  2. Step 2: Convert to fraction form
    103,875.79/155,690.64 = 47,668.52/x
  3. Step 3: Cross multiply
    103,875.79x = 155,690.64 × 47,668.52
  4. Step 4: Simplify right side
    103,875.79x = 7,421,542,386.65
  5. Step 5: Solve for x
    x = 7,421,542,386.65/103,875.79
  6. Step 6: Final answer
    x = 71,446.31

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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.