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Finding the Fourth Proportional to 108,671.14, 149,987.13 and 70,879.78

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Solution

The fourth proportional to 108,671.14, 149,987.13 and 70,879.78 is: 97,827.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,671.14 : 149,987.13 = 70,879.78 : x
  2. Step 2: Convert to fraction form
    108,671.14/149,987.13 = 70,879.78/x
  3. Step 3: Cross multiply
    108,671.14x = 149,987.13 × 70,879.78
  4. Step 4: Simplify right side
    108,671.14x = 10,631,054,777.23
  5. Step 5: Solve for x
    x = 10,631,054,777.23/108,671.14
  6. Step 6: Final answer
    x = 97,827.77

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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.