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Finding the Fourth Proportional to 139,878.07, 210,000.02 and 83,055.73

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Solution

The fourth proportional to 139,878.07, 210,000.02 and 83,055.73 is: 124,692.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,878.07 : 210,000.02 = 83,055.73 : x
  2. Step 2: Convert to fraction form
    139,878.07/210,000.02 = 83,055.73/x
  3. Step 3: Cross multiply
    139,878.07x = 210,000.02 × 83,055.73
  4. Step 4: Simplify right side
    139,878.07x = 17,441,703,495.84
  5. Step 5: Solve for x
    x = 17,441,703,495.84/139,878.07
  6. Step 6: Final answer
    x = 124,692.20

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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.