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Finding the Fourth Proportional to 72,455.40, 108,629.10 and 37,420.20

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Solution

The fourth proportional to 72,455.40, 108,629.10 and 37,420.20 is: 56,102.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,455.40 : 108,629.10 = 37,420.20 : x
  2. Step 2: Convert to fraction form
    72,455.40/108,629.10 = 37,420.20/x
  3. Step 3: Cross multiply
    72,455.40x = 108,629.10 × 37,420.20
  4. Step 4: Simplify right side
    72,455.40x = 4,064,922,647.82
  5. Step 5: Solve for x
    x = 4,064,922,647.82/72,455.40
  6. Step 6: Final answer
    x = 56,102.41

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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.