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Finding the Fourth Proportional to 205,004.80, 307,550.40 and 86,615.20

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Solution

The fourth proportional to 205,004.80, 307,550.40 and 86,615.20 is: 129,941.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,004.80 : 307,550.40 = 86,615.20 : x
  2. Step 2: Convert to fraction form
    205,004.80/307,550.40 = 86,615.20/x
  3. Step 3: Cross multiply
    205,004.80x = 307,550.40 × 86,615.20
  4. Step 4: Simplify right side
    205,004.80x = 26,638,539,406.08
  5. Step 5: Solve for x
    x = 26,638,539,406.08/205,004.80
  6. Step 6: Final answer
    x = 129,941.05

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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.