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Finding the Fourth Proportional to 208,095.90, 312,289.65 and 133,397.70

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Solution

The fourth proportional to 208,095.90, 312,289.65 and 133,397.70 is: 200,190.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,095.90 : 312,289.65 = 133,397.70 : x
  2. Step 2: Convert to fraction form
    208,095.90/312,289.65 = 133,397.70/x
  3. Step 3: Cross multiply
    208,095.90x = 312,289.65 × 133,397.70
  4. Step 4: Simplify right side
    208,095.90x = 41,658,721,043.81
  5. Step 5: Solve for x
    x = 41,658,721,043.81/208,095.90
  6. Step 6: Final answer
    x = 200,190.01

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1.5x scale

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.