Home / 121,830.21-168,146.46-70,872.51

Finding the Fourth Proportional to 121,830.21, 168,146.46 and 70,872.51

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Solution

The fourth proportional to 121,830.21, 168,146.46 and 70,872.51 is: 97,816.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,830.21 : 168,146.46 = 70,872.51 : x
  2. Step 2: Convert to fraction form
    121,830.21/168,146.46 = 70,872.51/x
  3. Step 3: Cross multiply
    121,830.21x = 168,146.46 × 70,872.51
  4. Step 4: Simplify right side
    121,830.21x = 11,916,961,667.81
  5. Step 5: Solve for x
    x = 11,916,961,667.81/121,830.21
  6. Step 6: Final answer
    x = 97,816.15

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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.