Home / 387,620.10-581,430.15-121,462.20

Finding the Fourth Proportional to 387,620.10, 581,430.15 and 121,462.20

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Solution

The fourth proportional to 387,620.10, 581,430.15 and 121,462.20 is: 182,193.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,620.10 : 581,430.15 = 121,462.20 : x
  2. Step 2: Convert to fraction form
    387,620.10/581,430.15 = 121,462.20/x
  3. Step 3: Cross multiply
    387,620.10x = 581,430.15 × 121,462.20
  4. Step 4: Simplify right side
    387,620.10x = 70,621,785,165.33
  5. Step 5: Solve for x
    x = 70,621,785,165.33/387,620.10
  6. Step 6: Final answer
    x = 182,193.30

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1.5x scale

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.