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Finding the Fourth Proportional to 118,657.51, 163,686.02 and 70,231.86

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Solution

The fourth proportional to 118,657.51, 163,686.02 and 70,231.86 is: 96,883.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,657.51 : 163,686.02 = 70,231.86 : x
  2. Step 2: Convert to fraction form
    118,657.51/163,686.02 = 70,231.86/x
  3. Step 3: Cross multiply
    118,657.51x = 163,686.02 × 70,231.86
  4. Step 4: Simplify right side
    118,657.51x = 11,495,973,289.44
  5. Step 5: Solve for x
    x = 11,495,973,289.44/118,657.51
  6. Step 6: Final answer
    x = 96,883.66

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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.