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Finding the Fourth Proportional to 103,428.80, 142,750.32 and 60,984.80

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Solution

The fourth proportional to 103,428.80, 142,750.32 and 60,984.80 is: 84,169.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,428.80 : 142,750.32 = 60,984.80 : x
  2. Step 2: Convert to fraction form
    103,428.80/142,750.32 = 60,984.80/x
  3. Step 3: Cross multiply
    103,428.80x = 142,750.32 × 60,984.80
  4. Step 4: Simplify right side
    103,428.80x = 8,705,599,715.14
  5. Step 5: Solve for x
    x = 8,705,599,715.14/103,428.80
  6. Step 6: Final answer
    x = 84,169.98

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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.