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Finding the Fourth Proportional to 138,881.64, 191,656.92 and 75,219.46

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Solution

The fourth proportional to 138,881.64, 191,656.92 and 75,219.46 is: 103,802.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,881.64 : 191,656.92 = 75,219.46 : x
  2. Step 2: Convert to fraction form
    138,881.64/191,656.92 = 75,219.46/x
  3. Step 3: Cross multiply
    138,881.64x = 191,656.92 × 75,219.46
  4. Step 4: Simplify right side
    138,881.64x = 14,416,329,830.59
  5. Step 5: Solve for x
    x = 14,416,329,830.59/138,881.64
  6. Step 6: Final answer
    x = 103,802.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.