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Finding the Fourth Proportional to 128,137.47, 176,829.06 and 71,548.86

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Solution

The fourth proportional to 128,137.47, 176,829.06 and 71,548.86 is: 98,737.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,137.47 : 176,829.06 = 71,548.86 : x
  2. Step 2: Convert to fraction form
    128,137.47/176,829.06 = 71,548.86/x
  3. Step 3: Cross multiply
    128,137.47x = 176,829.06 × 71,548.86
  4. Step 4: Simplify right side
    128,137.47x = 12,651,917,657.87
  5. Step 5: Solve for x
    x = 12,651,917,657.87/128,137.47
  6. Step 6: Final answer
    x = 98,737.06

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1.5x scale

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.