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Finding the Fourth Proportional to 103,668.30, 142,931.40 and 67,801.50

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Solution

The fourth proportional to 103,668.30, 142,931.40 and 67,801.50 is: 93,480.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,668.30 : 142,931.40 = 67,801.50 : x
  2. Step 2: Convert to fraction form
    103,668.30/142,931.40 = 67,801.50/x
  3. Step 3: Cross multiply
    103,668.30x = 142,931.40 × 67,801.50
  4. Step 4: Simplify right side
    103,668.30x = 9,690,963,317.10
  5. Step 5: Solve for x
    x = 9,690,963,317.10/103,668.30
  6. Step 6: Final answer
    x = 93,480.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.