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Finding the Fourth Proportional to 139,148.40, 208,415.40 and 55,999.60

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Solution

The fourth proportional to 139,148.40, 208,415.40 and 55,999.60 is: 83,875.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,148.40 : 208,415.40 = 55,999.60 : x
  2. Step 2: Convert to fraction form
    139,148.40/208,415.40 = 55,999.60/x
  3. Step 3: Cross multiply
    139,148.40x = 208,415.40 × 55,999.60
  4. Step 4: Simplify right side
    139,148.40x = 11,671,179,033.84
  5. Step 5: Solve for x
    x = 11,671,179,033.84/139,148.40
  6. Step 6: Final answer
    x = 83,875.77

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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.