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Finding the Fourth Proportional to 128,525.60, 177,367.52 and 70,387.43

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Solution

The fourth proportional to 128,525.60, 177,367.52 and 70,387.43 is: 97,135.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525.60 : 177,367.52 = 70,387.43 : x
  2. Step 2: Convert to fraction form
    128,525.60/177,367.52 = 70,387.43/x
  3. Step 3: Cross multiply
    128,525.60x = 177,367.52 × 70,387.43
  4. Step 4: Simplify right side
    128,525.60x = 12,484,443,898.27
  5. Step 5: Solve for x
    x = 12,484,443,898.27/128,525.60
  6. Step 6: Final answer
    x = 97,135.85

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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.