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Finding the Fourth Proportional to 92,959.48, 128,388.54 and 71,992.36

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Solution

The fourth proportional to 92,959.48, 128,388.54 and 71,992.36 is: 99,430.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,959.48 : 128,388.54 = 71,992.36 : x
  2. Step 2: Convert to fraction form
    92,959.48/128,388.54 = 71,992.36/x
  3. Step 3: Cross multiply
    92,959.48x = 128,388.54 × 71,992.36
  4. Step 4: Simplify right side
    92,959.48x = 9,242,993,991.55
  5. Step 5: Solve for x
    x = 9,242,993,991.55/92,959.48
  6. Step 6: Final answer
    x = 99,430.35

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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.