Home / 142,389.14-213,478.25-86,216.04

Finding the Fourth Proportional to 142,389.14, 213,478.25 and 86,216.04

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Solution

The fourth proportional to 142,389.14, 213,478.25 and 86,216.04 is: 129,260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,389.14 : 213,478.25 = 86,216.04 : x
  2. Step 2: Convert to fraction form
    142,389.14/213,478.25 = 86,216.04/x
  3. Step 3: Cross multiply
    142,389.14x = 213,478.25 × 86,216.04
  4. Step 4: Simplify right side
    142,389.14x = 18,405,249,341.13
  5. Step 5: Solve for x
    x = 18,405,249,341.13/142,389.14
  6. Step 6: Final answer
    x = 129,260.21

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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.