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Finding the Fourth Proportional to 92,712.60, 139,068.90 and 91,728.45

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Solution

The fourth proportional to 92,712.60, 139,068.90 and 91,728.45 is: 137,592.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,712.60 : 139,068.90 = 91,728.45 : x
  2. Step 2: Convert to fraction form
    92,712.60/139,068.90 = 91,728.45/x
  3. Step 3: Cross multiply
    92,712.60x = 139,068.90 × 91,728.45
  4. Step 4: Simplify right side
    92,712.60x = 12,756,574,640.21
  5. Step 5: Solve for x
    x = 12,756,574,640.21/92,712.60
  6. Step 6: Final answer
    x = 137,592.68

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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.