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Finding the Fourth Proportional to 74,856.60, 112,328.10 and 28,114.20

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Solution

The fourth proportional to 74,856.60, 112,328.10 and 28,114.20 is: 42,187.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,856.60 : 112,328.10 = 28,114.20 : x
  2. Step 2: Convert to fraction form
    74,856.60/112,328.10 = 28,114.20/x
  3. Step 3: Cross multiply
    74,856.60x = 112,328.10 × 28,114.20
  4. Step 4: Simplify right side
    74,856.60x = 3,158,014,669.02
  5. Step 5: Solve for x
    x = 3,158,014,669.02/74,856.60
  6. Step 6: Final answer
    x = 42,187.52

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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.