Home / 128,890.47-193,328.01-76,632.51

Finding the Fourth Proportional to 128,890.47, 193,328.01 and 76,632.51

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Solution

The fourth proportional to 128,890.47, 193,328.01 and 76,632.51 is: 114,944.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,890.47 : 193,328.01 = 76,632.51 : x
  2. Step 2: Convert to fraction form
    128,890.47/193,328.01 = 76,632.51/x
  3. Step 3: Cross multiply
    128,890.47x = 193,328.01 × 76,632.51
  4. Step 4: Simplify right side
    128,890.47x = 14,815,210,659.61
  5. Step 5: Solve for x
    x = 14,815,210,659.61/128,890.47
  6. Step 6: Final answer
    x = 114,944.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.