Home / 209,973.10-315,090.30-85,314.10

Finding the Fourth Proportional to 209,973.10, 315,090.30 and 85,314.10

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Solution

The fourth proportional to 209,973.10, 315,090.30 and 85,314.10 is: 128,024.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,973.10 : 315,090.30 = 85,314.10 : x
  2. Step 2: Convert to fraction form
    209,973.10/315,090.30 = 85,314.10/x
  3. Step 3: Cross multiply
    209,973.10x = 315,090.30 × 85,314.10
  4. Step 4: Simplify right side
    209,973.10x = 26,881,645,363.23
  5. Step 5: Solve for x
    x = 26,881,645,363.23/209,973.10
  6. Step 6: Final answer
    x = 128,024.23

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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.