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Finding the Fourth Proportional to 74,985.14, 112,506.11 and 45,020.30

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Solution

The fourth proportional to 74,985.14, 112,506.11 and 45,020.30 is: 67,547.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,985.14 : 112,506.11 = 45,020.30 : x
  2. Step 2: Convert to fraction form
    74,985.14/112,506.11 = 45,020.30/x
  3. Step 3: Cross multiply
    74,985.14x = 112,506.11 × 45,020.30
  4. Step 4: Simplify right side
    74,985.14x = 5,065,059,091.31
  5. Step 5: Solve for x
    x = 5,065,059,091.31/74,985.14
  6. Step 6: Final answer
    x = 67,547.51

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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.