Home / 139,947-193,126.32-76,284.60

Finding the Fourth Proportional to 139,947, 193,126.32 and 76,284.60

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Solution

The fourth proportional to 139,947, 193,126.32 and 76,284.60 is: 105,272.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,947 : 193,126.32 = 76,284.60 : x
  2. Step 2: Convert to fraction form
    139,947/193,126.32 = 76,284.60/x
  3. Step 3: Cross multiply
    139,947x = 193,126.32 × 76,284.60
  4. Step 4: Simplify right side
    139,947x = 14,732,564,070.67
  5. Step 5: Solve for x
    x = 14,732,564,070.67/139,947
  6. Step 6: Final answer
    x = 105,272.45

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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.