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Finding the Fourth Proportional to 128,592.58, 177,429.06 and 77,613.64

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Solution

The fourth proportional to 128,592.58, 177,429.06 and 77,613.64 is: 107,089.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,592.58 : 177,429.06 = 77,613.64 : x
  2. Step 2: Convert to fraction form
    128,592.58/177,429.06 = 77,613.64/x
  3. Step 3: Cross multiply
    128,592.58x = 177,429.06 × 77,613.64
  4. Step 4: Simplify right side
    128,592.58x = 13,770,915,188.38
  5. Step 5: Solve for x
    x = 13,770,915,188.38/128,592.58
  6. Step 6: Final answer
    x = 107,089.50

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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.