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Finding the Fourth Proportional to 128,784.45, 193,176.68 and 128,784.45

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Solution

The fourth proportional to 128,784.45, 193,176.68 and 128,784.45 is: 193,176.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,784.45 : 193,176.68 = 128,784.45 : x
  2. Step 2: Convert to fraction form
    128,784.45/193,176.68 = 128,784.45/x
  3. Step 3: Cross multiply
    128,784.45x = 193,176.68 × 128,784.45
  4. Step 4: Simplify right side
    128,784.45x = 24,878,151,842.70
  5. Step 5: Solve for x
    x = 24,878,151,842.70/128,784.45
  6. Step 6: Final answer
    x = 193,176.68

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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.