Home / 78,305.45-117,457.16-19,141.63

Finding the Fourth Proportional to 78,305.45, 117,457.16 and 19,141.63

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Solution

The fourth proportional to 78,305.45, 117,457.16 and 19,141.63 is: 28,712.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,305.45 : 117,457.16 = 19,141.63 : x
  2. Step 2: Convert to fraction form
    78,305.45/117,457.16 = 19,141.63/x
  3. Step 3: Cross multiply
    78,305.45x = 117,457.16 × 19,141.63
  4. Step 4: Simplify right side
    78,305.45x = 2,248,321,108.22
  5. Step 5: Solve for x
    x = 2,248,321,108.22/78,305.45
  6. Step 6: Final answer
    x = 28,712.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.