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Finding the Fourth Proportional to 66,124.98, 91,260.81 and 40,978.26

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Solution

The fourth proportional to 66,124.98, 91,260.81 and 40,978.26 is: 56,555.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,124.98 : 91,260.81 = 40,978.26 : x
  2. Step 2: Convert to fraction form
    66,124.98/91,260.81 = 40,978.26/x
  3. Step 3: Cross multiply
    66,124.98x = 91,260.81 × 40,978.26
  4. Step 4: Simplify right side
    66,124.98x = 3,739,709,199.99
  5. Step 5: Solve for x
    x = 3,739,709,199.99/66,124.98
  6. Step 6: Final answer
    x = 56,555.17

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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.