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Finding the Fourth Proportional to 127.48, 176.07 and 90.76

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Solution

The fourth proportional to 127.48, 176.07 and 90.76 is: 125.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.48 : 176.07 = 90.76 : x
  2. Step 2: Convert to fraction form
    127.48/176.07 = 90.76/x
  3. Step 3: Cross multiply
    127.48x = 176.07 × 90.76
  4. Step 4: Simplify right side
    127.48x = 15,980.11
  5. Step 5: Solve for x
    x = 15,980.11/127.48
  6. Step 6: Final answer
    x = 125.35

Related Problems

Find fourth proportional to 63.74, 88.04 and 45.38
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Double scale
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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.