Home / 122,130.91-168,542.40-71,142.31

Finding the Fourth Proportional to 122,130.91, 168,542.40 and 71,142.31

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Solution

The fourth proportional to 122,130.91, 168,542.40 and 71,142.31 is: 98,177.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,130.91 : 168,542.40 = 71,142.31 : x
  2. Step 2: Convert to fraction form
    122,130.91/168,542.40 = 71,142.31/x
  3. Step 3: Cross multiply
    122,130.91x = 168,542.40 × 71,142.31
  4. Step 4: Simplify right side
    122,130.91x = 11,990,495,668.94
  5. Step 5: Solve for x
    x = 11,990,495,668.94/122,130.91
  6. Step 6: Final answer
    x = 98,177.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.