Home / 108,398.17-149,386.85-78,131.17

Finding the Fourth Proportional to 108,398.17, 149,386.85 and 78,131.17

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Solution

The fourth proportional to 108,398.17, 149,386.85 and 78,131.17 is: 107,674.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,398.17 : 149,386.85 = 78,131.17 : x
  2. Step 2: Convert to fraction form
    108,398.17/149,386.85 = 78,131.17/x
  3. Step 3: Cross multiply
    108,398.17x = 149,386.85 × 78,131.17
  4. Step 4: Simplify right side
    108,398.17x = 11,671,768,982.46
  5. Step 5: Solve for x
    x = 11,671,768,982.46/108,398.17
  6. Step 6: Final answer
    x = 107,674.96

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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.