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Finding the Fourth Proportional to 74,973.60, 112,503.60 and 28,231.20

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Solution

The fourth proportional to 74,973.60, 112,503.60 and 28,231.20 is: 42,363.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,973.60 : 112,503.60 = 28,231.20 : x
  2. Step 2: Convert to fraction form
    74,973.60/112,503.60 = 28,231.20/x
  3. Step 3: Cross multiply
    74,973.60x = 112,503.60 × 28,231.20
  4. Step 4: Simplify right side
    74,973.60x = 3,176,111,632.32
  5. Step 5: Solve for x
    x = 3,176,111,632.32/74,973.60
  6. Step 6: Final answer
    x = 42,363.07

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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.