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Finding the Fourth Proportional to 123,087.60, 184,631.40 and 83,721.60

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Solution

The fourth proportional to 123,087.60, 184,631.40 and 83,721.60 is: 125,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,087.60 : 184,631.40 = 83,721.60 : x
  2. Step 2: Convert to fraction form
    123,087.60/184,631.40 = 83,721.60/x
  3. Step 3: Cross multiply
    123,087.60x = 184,631.40 × 83,721.60
  4. Step 4: Simplify right side
    123,087.60x = 15,457,636,218.24
  5. Step 5: Solve for x
    x = 15,457,636,218.24/123,087.60
  6. Step 6: Final answer
    x = 125,582.40

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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.