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Finding the Fourth Proportional to 74,969.55, 103,460.74 and 40,980.30

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Solution

The fourth proportional to 74,969.55, 103,460.74 and 40,980.30 is: 56,554.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,969.55 : 103,460.74 = 40,980.30 : x
  2. Step 2: Convert to fraction form
    74,969.55/103,460.74 = 40,980.30/x
  3. Step 3: Cross multiply
    74,969.55x = 103,460.74 × 40,980.30
  4. Step 4: Simplify right side
    74,969.55x = 4,239,852,776.46
  5. Step 5: Solve for x
    x = 4,239,852,776.46/74,969.55
  6. Step 6: Final answer
    x = 56,554.33

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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.