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Finding the Fourth Proportional to 92,788.84, 139,878.58 and 86,609.42

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Solution

The fourth proportional to 92,788.84, 139,878.58 and 86,609.42 is: 130,563.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,788.84 : 139,878.58 = 86,609.42 : x
  2. Step 2: Convert to fraction form
    92,788.84/139,878.58 = 86,609.42/x
  3. Step 3: Cross multiply
    92,788.84x = 139,878.58 × 86,609.42
  4. Step 4: Simplify right side
    92,788.84x = 12,114,803,242.06
  5. Step 5: Solve for x
    x = 12,114,803,242.06/92,788.84
  6. Step 6: Final answer
    x = 130,563.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.