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Finding the Fourth Proportional to 74,374.32, 111,561.47 and 18,970.32

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Solution

The fourth proportional to 74,374.32, 111,561.47 and 18,970.32 is: 28,455.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,374.32 : 111,561.47 = 18,970.32 : x
  2. Step 2: Convert to fraction form
    74,374.32/111,561.47 = 18,970.32/x
  3. Step 3: Cross multiply
    74,374.32x = 111,561.47 × 18,970.32
  4. Step 4: Simplify right side
    74,374.32x = 2,116,356,227.76
  5. Step 5: Solve for x
    x = 2,116,356,227.76/74,374.32
  6. Step 6: Final answer
    x = 28,455.47

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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.