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Finding the Fourth Proportional to 74,809.61, 103,241.21 and 42,980.57

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Solution

The fourth proportional to 74,809.61, 103,241.21 and 42,980.57 is: 59,315.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,809.61 : 103,241.21 = 42,980.57 : x
  2. Step 2: Convert to fraction form
    74,809.61/103,241.21 = 42,980.57/x
  3. Step 3: Cross multiply
    74,809.61x = 103,241.21 × 42,980.57
  4. Step 4: Simplify right side
    74,809.61x = 4,437,366,053.29
  5. Step 5: Solve for x
    x = 4,437,366,053.29/74,809.61
  6. Step 6: Final answer
    x = 59,315.45

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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.