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Finding the Fourth Proportional to 139,225.60, 208,838.40 and 45,740.80

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Solution

The fourth proportional to 139,225.60, 208,838.40 and 45,740.80 is: 68,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,225.60 : 208,838.40 = 45,740.80 : x
  2. Step 2: Convert to fraction form
    139,225.60/208,838.40 = 45,740.80/x
  3. Step 3: Cross multiply
    139,225.60x = 208,838.40 × 45,740.80
  4. Step 4: Simplify right side
    139,225.60x = 9,552,435,486.72
  5. Step 5: Solve for x
    x = 9,552,435,486.72/139,225.60
  6. Step 6: Final answer
    x = 68,611.20

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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.