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Finding the Fourth Proportional to 74,989.80, 112,557.60 and 45,465.30

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Solution

The fourth proportional to 74,989.80, 112,557.60 and 45,465.30 is: 68,242.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,989.80 : 112,557.60 = 45,465.30 : x
  2. Step 2: Convert to fraction form
    74,989.80/112,557.60 = 45,465.30/x
  3. Step 3: Cross multiply
    74,989.80x = 112,557.60 × 45,465.30
  4. Step 4: Simplify right side
    74,989.80x = 5,117,465,051.28
  5. Step 5: Solve for x
    x = 5,117,465,051.28/74,989.80
  6. Step 6: Final answer
    x = 68,242.15

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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.