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Finding the Fourth Proportional to 156.95, 235.50 and 70.28

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Solution

The fourth proportional to 156.95, 235.50 and 70.28 is: 105.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.95 : 235.50 = 70.28 : x
  2. Step 2: Convert to fraction form
    156.95/235.50 = 70.28/x
  3. Step 3: Cross multiply
    156.95x = 235.50 × 70.28
  4. Step 4: Simplify right side
    156.95x = 16,551.18
  5. Step 5: Solve for x
    x = 16,551.18/156.95
  6. Step 6: Final answer
    x = 105.45

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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.