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Finding the Fourth Proportional to 66,118.70, 91,220.96 and 42,259.34

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Solution

The fourth proportional to 66,118.70, 91,220.96 and 42,259.34 is: 58,303.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,118.70 : 91,220.96 = 42,259.34 : x
  2. Step 2: Convert to fraction form
    66,118.70/91,220.96 = 42,259.34/x
  3. Step 3: Cross multiply
    66,118.70x = 91,220.96 × 42,259.34
  4. Step 4: Simplify right side
    66,118.70x = 3,854,937,563.77
  5. Step 5: Solve for x
    x = 3,854,937,563.77/66,118.70
  6. Step 6: Final answer
    x = 58,303.29

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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.