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Finding the Fourth Proportional to 139,017.17, 191,838.55 and 75,353.60

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Solution

The fourth proportional to 139,017.17, 191,838.55 and 75,353.60 is: 103,985.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,017.17 : 191,838.55 = 75,353.60 : x
  2. Step 2: Convert to fraction form
    139,017.17/191,838.55 = 75,353.60/x
  3. Step 3: Cross multiply
    139,017.17x = 191,838.55 × 75,353.60
  4. Step 4: Simplify right side
    139,017.17x = 14,455,725,361.28
  5. Step 5: Solve for x
    x = 14,455,725,361.28/139,017.17
  6. Step 6: Final answer
    x = 103,985.18

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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.