Home / 128,880.83-193,397.79-69,715.19

Finding the Fourth Proportional to 128,880.83, 193,397.79 and 69,715.19

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Solution

The fourth proportional to 128,880.83, 193,397.79 and 69,715.19 is: 104,614.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,880.83 : 193,397.79 = 69,715.19 : x
  2. Step 2: Convert to fraction form
    128,880.83/193,397.79 = 69,715.19/x
  3. Step 3: Cross multiply
    128,880.83x = 193,397.79 × 69,715.19
  4. Step 4: Simplify right side
    128,880.83x = 13,482,763,675.43
  5. Step 5: Solve for x
    x = 13,482,763,675.43/128,880.83
  6. Step 6: Final answer
    x = 104,614.19

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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.