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Finding the Fourth Proportional to 85,920.68, 118,301.10 and 78,047.48

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Solution

The fourth proportional to 85,920.68, 118,301.10 and 78,047.48 is: 107,460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,920.68 : 118,301.10 = 78,047.48 : x
  2. Step 2: Convert to fraction form
    85,920.68/118,301.10 = 78,047.48/x
  3. Step 3: Cross multiply
    85,920.68x = 118,301.10 × 78,047.48
  4. Step 4: Simplify right side
    85,920.68x = 9,233,102,736.23
  5. Step 5: Solve for x
    x = 9,233,102,736.23/85,920.68
  6. Step 6: Final answer
    x = 107,460.77

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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.