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Finding the Fourth Proportional to 86,454.98, 129,682.48 and 66,762.26

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Solution

The fourth proportional to 86,454.98, 129,682.48 and 66,762.26 is: 100,143.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,454.98 : 129,682.48 = 66,762.26 : x
  2. Step 2: Convert to fraction form
    86,454.98/129,682.48 = 66,762.26/x
  3. Step 3: Cross multiply
    86,454.98x = 129,682.48 × 66,762.26
  4. Step 4: Simplify right side
    86,454.98x = 8,657,895,447.20
  5. Step 5: Solve for x
    x = 8,657,895,447.20/86,454.98
  6. Step 6: Final answer
    x = 100,143.40

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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.