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Finding the Fourth Proportional to 128,654.55, 177,548.93 and 71,293.71

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Solution

The fourth proportional to 128,654.55, 177,548.93 and 71,293.71 is: 98,388.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,654.55 : 177,548.93 = 71,293.71 : x
  2. Step 2: Convert to fraction form
    128,654.55/177,548.93 = 71,293.71/x
  3. Step 3: Cross multiply
    128,654.55x = 177,548.93 × 71,293.71
  4. Step 4: Simplify right side
    128,654.55x = 12,658,121,926.23
  5. Step 5: Solve for x
    x = 12,658,121,926.23/128,654.55
  6. Step 6: Final answer
    x = 98,388.45

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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.