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Finding the Fourth Proportional to 103,688.80, 155,533.20 and 101,384.80

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Solution

The fourth proportional to 103,688.80, 155,533.20 and 101,384.80 is: 152,077.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,688.80 : 155,533.20 = 101,384.80 : x
  2. Step 2: Convert to fraction form
    103,688.80/155,533.20 = 101,384.80/x
  3. Step 3: Cross multiply
    103,688.80x = 155,533.20 × 101,384.80
  4. Step 4: Simplify right side
    103,688.80x = 15,768,702,375.36
  5. Step 5: Solve for x
    x = 15,768,702,375.36/103,688.80
  6. Step 6: Final answer
    x = 152,077.20

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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.