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Finding the Fourth Proportional to 128,314.71, 177,080.45 and 70,953.03

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Solution

The fourth proportional to 128,314.71, 177,080.45 and 70,953.03 is: 97,918.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,314.71 : 177,080.45 = 70,953.03 : x
  2. Step 2: Convert to fraction form
    128,314.71/177,080.45 = 70,953.03/x
  3. Step 3: Cross multiply
    128,314.71x = 177,080.45 × 70,953.03
  4. Step 4: Simplify right side
    128,314.71x = 12,564,394,126.50
  5. Step 5: Solve for x
    x = 12,564,394,126.50/128,314.71
  6. Step 6: Final answer
    x = 97,918.58

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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.