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Finding the Fourth Proportional to 151,138.50, 208,572.35 and 84,070.50

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Solution

The fourth proportional to 151,138.50, 208,572.35 and 84,070.50 is: 116,017.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,138.50 : 208,572.35 = 84,070.50 : x
  2. Step 2: Convert to fraction form
    151,138.50/208,572.35 = 84,070.50/x
  3. Step 3: Cross multiply
    151,138.50x = 208,572.35 × 84,070.50
  4. Step 4: Simplify right side
    151,138.50x = 17,534,781,330.32
  5. Step 5: Solve for x
    x = 17,534,781,330.32/151,138.50
  6. Step 6: Final answer
    x = 116,017.97

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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.