Home / 66,120.48-91,254.60-40,973.76

Finding the Fourth Proportional to 66,120.48, 91,254.60 and 40,973.76

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Solution

The fourth proportional to 66,120.48, 91,254.60 and 40,973.76 is: 56,548.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,120.48 : 91,254.60 = 40,973.76 : x
  2. Step 2: Convert to fraction form
    66,120.48/91,254.60 = 40,973.76/x
  3. Step 3: Cross multiply
    66,120.48x = 91,254.60 × 40,973.76
  4. Step 4: Simplify right side
    66,120.48x = 3,739,044,079.30
  5. Step 5: Solve for x
    x = 3,739,044,079.30/66,120.48
  6. Step 6: Final answer
    x = 56,548.96

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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.