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Finding the Fourth Proportional to 92,420.84, 137,962.72 and 81,210.80

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Solution

The fourth proportional to 92,420.84, 137,962.72 and 81,210.80 is: 121,228.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,420.84 : 137,962.72 = 81,210.80 : x
  2. Step 2: Convert to fraction form
    92,420.84/137,962.72 = 81,210.80/x
  3. Step 3: Cross multiply
    92,420.84x = 137,962.72 × 81,210.80
  4. Step 4: Simplify right side
    92,420.84x = 11,204,062,861.38
  5. Step 5: Solve for x
    x = 11,204,062,861.38/92,420.84
  6. Step 6: Final answer
    x = 121,228.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.