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Finding the Fourth Proportional to 128,029.80, 176,681.14 and 70,669.14

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Solution

The fourth proportional to 128,029.80, 176,681.14 and 70,669.14 is: 97,523.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,029.80 : 176,681.14 = 70,669.14 : x
  2. Step 2: Convert to fraction form
    128,029.80/176,681.14 = 70,669.14/x
  3. Step 3: Cross multiply
    128,029.80x = 176,681.14 × 70,669.14
  4. Step 4: Simplify right side
    128,029.80x = 12,485,902,981.27
  5. Step 5: Solve for x
    x = 12,485,902,981.27/128,029.80
  6. Step 6: Final answer
    x = 97,523.41

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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.