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Finding the Fourth Proportional to 136,798.03, 188,784.45 and 85,812.91

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Solution

The fourth proportional to 136,798.03, 188,784.45 and 85,812.91 is: 118,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,798.03 : 188,784.45 = 85,812.91 : x
  2. Step 2: Convert to fraction form
    136,798.03/188,784.45 = 85,812.91/x
  3. Step 3: Cross multiply
    136,798.03x = 188,784.45 × 85,812.91
  4. Step 4: Simplify right side
    136,798.03x = 16,200,142,545.29
  5. Step 5: Solve for x
    x = 16,200,142,545.29/136,798.03
  6. Step 6: Final answer
    x = 118,423.80

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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.