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Finding the Fourth Proportional to 136,953.60, 205,430.40 and 77,904.60

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Solution

The fourth proportional to 136,953.60, 205,430.40 and 77,904.60 is: 116,856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,953.60 : 205,430.40 = 77,904.60 : x
  2. Step 2: Convert to fraction form
    136,953.60/205,430.40 = 77,904.60/x
  3. Step 3: Cross multiply
    136,953.60x = 205,430.40 × 77,904.60
  4. Step 4: Simplify right side
    136,953.60x = 16,003,973,139.84
  5. Step 5: Solve for x
    x = 16,003,973,139.84/136,953.60
  6. Step 6: Final answer
    x = 116,856.90

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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.