Home / 128,913.69-193,375.76-61,411.01

Finding the Fourth Proportional to 128,913.69, 193,375.76 and 61,411.01

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Solution

The fourth proportional to 128,913.69, 193,375.76 and 61,411.01 is: 92,118.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,913.69 : 193,375.76 = 61,411.01 : x
  2. Step 2: Convert to fraction form
    128,913.69/193,375.76 = 61,411.01/x
  3. Step 3: Cross multiply
    128,913.69x = 193,375.76 × 61,411.01
  4. Step 4: Simplify right side
    128,913.69x = 11,875,399,457.18
  5. Step 5: Solve for x
    x = 11,875,399,457.18/128,913.69
  6. Step 6: Final answer
    x = 92,118.99

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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.