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Finding the Fourth Proportional to 163,712.80, 245,439.60 and 89,840.80

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Solution

The fourth proportional to 163,712.80, 245,439.60 and 89,840.80 is: 134,690.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,712.80 : 245,439.60 = 89,840.80 : x
  2. Step 2: Convert to fraction form
    163,712.80/245,439.60 = 89,840.80/x
  3. Step 3: Cross multiply
    163,712.80x = 245,439.60 × 89,840.80
  4. Step 4: Simplify right side
    163,712.80x = 22,050,490,015.68
  5. Step 5: Solve for x
    x = 22,050,490,015.68/163,712.80
  6. Step 6: Final answer
    x = 134,690.08

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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.