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Finding the Fourth Proportional to 84,430.60, 126,492.30 and 68,763.40

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Solution

The fourth proportional to 84,430.60, 126,492.30 and 68,763.40 is: 103,020.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,430.60 : 126,492.30 = 68,763.40 : x
  2. Step 2: Convert to fraction form
    84,430.60/126,492.30 = 68,763.40/x
  3. Step 3: Cross multiply
    84,430.60x = 126,492.30 × 68,763.40
  4. Step 4: Simplify right side
    84,430.60x = 8,698,040,621.82
  5. Step 5: Solve for x
    x = 8,698,040,621.82/84,430.60
  6. Step 6: Final answer
    x = 103,020.00

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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.