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Finding the Fourth Proportional to 139,010.84, 208,484.28 and 82,866.80

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Solution

The fourth proportional to 139,010.84, 208,484.28 and 82,866.80 is: 124,281.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,010.84 : 208,484.28 = 82,866.80 : x
  2. Step 2: Convert to fraction form
    139,010.84/208,484.28 = 82,866.80/x
  3. Step 3: Cross multiply
    139,010.84x = 208,484.28 × 82,866.80
  4. Step 4: Simplify right side
    139,010.84x = 17,276,425,133.90
  5. Step 5: Solve for x
    x = 17,276,425,133.90/139,010.84
  6. Step 6: Final answer
    x = 124,281.14

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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.