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Finding the Fourth Proportional to 129,648.19, 178,914.51 and 70,032.19

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Solution

The fourth proportional to 129,648.19, 178,914.51 and 70,032.19 is: 96,644.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,648.19 : 178,914.51 = 70,032.19 : x
  2. Step 2: Convert to fraction form
    129,648.19/178,914.51 = 70,032.19/x
  3. Step 3: Cross multiply
    129,648.19x = 178,914.51 × 70,032.19
  4. Step 4: Simplify right side
    129,648.19x = 12,529,774,607.92
  5. Step 5: Solve for x
    x = 12,529,774,607.92/129,648.19
  6. Step 6: Final answer
    x = 96,644.42

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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.