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Finding the Fourth Proportional to 121,762.30, 168,031.48 and 68,047.30

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Solution

The fourth proportional to 121,762.30, 168,031.48 and 68,047.30 is: 93,905.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,762.30 : 168,031.48 = 68,047.30 : x
  2. Step 2: Convert to fraction form
    121,762.30/168,031.48 = 68,047.30/x
  3. Step 3: Cross multiply
    121,762.30x = 168,031.48 × 68,047.30
  4. Step 4: Simplify right side
    121,762.30x = 11,434,088,529.00
  5. Step 5: Solve for x
    x = 11,434,088,529.00/121,762.30
  6. Step 6: Final answer
    x = 93,905.00

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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.