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Finding the Fourth Proportional to 92,681.70, 139,022.55 and 81,017.70

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Solution

The fourth proportional to 92,681.70, 139,022.55 and 81,017.70 is: 121,526.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,681.70 : 139,022.55 = 81,017.70 : x
  2. Step 2: Convert to fraction form
    92,681.70/139,022.55 = 81,017.70/x
  3. Step 3: Cross multiply
    92,681.70x = 139,022.55 × 81,017.70
  4. Step 4: Simplify right side
    92,681.70x = 11,263,287,249.14
  5. Step 5: Solve for x
    x = 11,263,287,249.14/92,681.70
  6. Step 6: Final answer
    x = 121,526.55

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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.