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Finding the Fourth Proportional to 130, 179.41 and 74.76

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Solution

The fourth proportional to 130, 179.41 and 74.76 is: 103.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    130 : 179.41 = 74.76 : x
  2. Step 2: Convert to fraction form
    130/179.41 = 74.76/x
  3. Step 3: Cross multiply
    130x = 179.41 × 74.76
  4. Step 4: Simplify right side
    130x = 13,412.69
  5. Step 5: Solve for x
    x = 13,412.69/130
  6. Step 6: Final answer
    x = 103.17

Related Problems

Find fourth proportional to 65, 89.71 and 37.38
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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.