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Finding the Fourth Proportional to 454,615.80, 681,898.98 and 139,072.70

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Solution

The fourth proportional to 454,615.80, 681,898.98 and 139,072.70 is: 208,601.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,615.80 : 681,898.98 = 139,072.70 : x
  2. Step 2: Convert to fraction form
    454,615.80/681,898.98 = 139,072.70/x
  3. Step 3: Cross multiply
    454,615.80x = 681,898.98 × 139,072.70
  4. Step 4: Simplify right side
    454,615.80x = 94,833,533,980.59
  5. Step 5: Solve for x
    x = 94,833,533,980.59/454,615.80
  6. Step 6: Final answer
    x = 208,601.49

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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.