Home / 205,711.59-308,333.16-128,810.53

Finding the Fourth Proportional to 205,711.59, 308,333.16 and 128,810.53

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Solution

The fourth proportional to 205,711.59, 308,333.16 and 128,810.53 is: 193,069.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,711.59 : 308,333.16 = 128,810.53 : x
  2. Step 2: Convert to fraction form
    205,711.59/308,333.16 = 128,810.53/x
  3. Step 3: Cross multiply
    205,711.59x = 308,333.16 × 128,810.53
  4. Step 4: Simplify right side
    205,711.59x = 39,716,556,985.34
  5. Step 5: Solve for x
    x = 39,716,556,985.34/205,711.59
  6. Step 6: Final answer
    x = 193,069.13

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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.