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Finding the Fourth Proportional to 128,962.71, 177,969.24 and 71,602.92

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Solution

The fourth proportional to 128,962.71, 177,969.24 and 71,602.92 is: 98,812.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,962.71 : 177,969.24 = 71,602.92 : x
  2. Step 2: Convert to fraction form
    128,962.71/177,969.24 = 71,602.92/x
  3. Step 3: Cross multiply
    128,962.71x = 177,969.24 × 71,602.92
  4. Step 4: Simplify right side
    128,962.71x = 12,743,117,254.18
  5. Step 5: Solve for x
    x = 12,743,117,254.18/128,962.71
  6. Step 6: Final answer
    x = 98,812.42

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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.