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Finding the Fourth Proportional to 92,986.50, 139,484.61 and 30,657

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Solution

The fourth proportional to 92,986.50, 139,484.61 and 30,657 is: 45,987.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,986.50 : 139,484.61 = 30,657 : x
  2. Step 2: Convert to fraction form
    92,986.50/139,484.61 = 30,657/x
  3. Step 3: Cross multiply
    92,986.50x = 139,484.61 × 30,657
  4. Step 4: Simplify right side
    92,986.50x = 4,276,179,688.77
  5. Step 5: Solve for x
    x = 4,276,179,688.77/92,986.50
  6. Step 6: Final answer
    x = 45,987.10

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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.