Home / 128,864.20-178,002.93-107,423.98

Finding the Fourth Proportional to 128,864.20, 178,002.93 and 107,423.98

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Solution

The fourth proportional to 128,864.20, 178,002.93 and 107,423.98 is: 148,387.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,864.20 : 178,002.93 = 107,423.98 : x
  2. Step 2: Convert to fraction form
    128,864.20/178,002.93 = 107,423.98/x
  3. Step 3: Cross multiply
    128,864.20x = 178,002.93 × 107,423.98
  4. Step 4: Simplify right side
    128,864.20x = 19,121,783,192.26
  5. Step 5: Solve for x
    x = 19,121,783,192.26/128,864.20
  6. Step 6: Final answer
    x = 148,387.09

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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.