Home / 213,802.81-320,065.29-129,307.39

Finding the Fourth Proportional to 213,802.81, 320,065.29 and 129,307.39

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Solution

The fourth proportional to 213,802.81, 320,065.29 and 129,307.39 is: 193,574.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,802.81 : 320,065.29 = 129,307.39 : x
  2. Step 2: Convert to fraction form
    213,802.81/320,065.29 = 129,307.39/x
  3. Step 3: Cross multiply
    213,802.81x = 320,065.29 × 129,307.39
  4. Step 4: Simplify right side
    213,802.81x = 41,386,807,279.49
  5. Step 5: Solve for x
    x = 41,386,807,279.49/213,802.81
  6. Step 6: Final answer
    x = 193,574.66

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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.