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Finding the Fourth Proportional to 129,472.48, 178,649.76 and 119,008.45

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Solution

The fourth proportional to 129,472.48, 178,649.76 and 119,008.45 is: 164,211.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,472.48 : 178,649.76 = 119,008.45 : x
  2. Step 2: Convert to fraction form
    129,472.48/178,649.76 = 119,008.45/x
  3. Step 3: Cross multiply
    129,472.48x = 178,649.76 × 119,008.45
  4. Step 4: Simplify right side
    129,472.48x = 21,260,831,030.47
  5. Step 5: Solve for x
    x = 21,260,831,030.47/129,472.48
  6. Step 6: Final answer
    x = 164,211.20

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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.