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Finding the Fourth Proportional to 191,881.80, 288,081.90 and 121,897.80

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Solution

The fourth proportional to 191,881.80, 288,081.90 and 121,897.80 is: 183,011.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,881.80 : 288,081.90 = 121,897.80 : x
  2. Step 2: Convert to fraction form
    191,881.80/288,081.90 = 121,897.80/x
  3. Step 3: Cross multiply
    191,881.80x = 288,081.90 × 121,897.80
  4. Step 4: Simplify right side
    191,881.80x = 35,116,549,829.82
  5. Step 5: Solve for x
    x = 35,116,549,829.82/191,881.80
  6. Step 6: Final answer
    x = 183,011.36

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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.