Home / 420,895.65-631,436.77-121,352.87

Finding the Fourth Proportional to 420,895.65, 631,436.77 and 121,352.87

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Solution

The fourth proportional to 420,895.65, 631,436.77 and 121,352.87 is: 182,056.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,895.65 : 631,436.77 = 121,352.87 : x
  2. Step 2: Convert to fraction form
    420,895.65/631,436.77 = 121,352.87/x
  3. Step 3: Cross multiply
    420,895.65x = 631,436.77 × 121,352.87
  4. Step 4: Simplify right side
    420,895.65x = 76,626,660,802.46
  5. Step 5: Solve for x
    x = 76,626,660,802.46/420,895.65
  6. Step 6: Final answer
    x = 182,056.20

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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.