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Finding the Fourth Proportional to 100,762.29, 138,994.22 and 62,970.93

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Solution

The fourth proportional to 100,762.29, 138,994.22 and 62,970.93 is: 86,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,762.29 : 138,994.22 = 62,970.93 : x
  2. Step 2: Convert to fraction form
    100,762.29/138,994.22 = 62,970.93/x
  3. Step 3: Cross multiply
    100,762.29x = 138,994.22 × 62,970.93
  4. Step 4: Simplify right side
    100,762.29x = 8,752,595,647.93
  5. Step 5: Solve for x
    x = 8,752,595,647.93/100,762.29
  6. Step 6: Final answer
    x = 86,863.80

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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.