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Finding the Fourth Proportional to 128,365.64, 192,539.82 and 45,248.84

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Solution

The fourth proportional to 128,365.64, 192,539.82 and 45,248.84 is: 67,870.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,365.64 : 192,539.82 = 45,248.84 : x
  2. Step 2: Convert to fraction form
    128,365.64/192,539.82 = 45,248.84/x
  3. Step 3: Cross multiply
    128,365.64x = 192,539.82 × 45,248.84
  4. Step 4: Simplify right side
    128,365.64x = 8,712,203,508.81
  5. Step 5: Solve for x
    x = 8,712,203,508.81/128,365.64
  6. Step 6: Final answer
    x = 67,870.21

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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.