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Finding the Fourth Proportional to 93,239.30, 139,530.90 and 85,366.10

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Solution

The fourth proportional to 93,239.30, 139,530.90 and 85,366.10 is: 127,748.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,239.30 : 139,530.90 = 85,366.10 : x
  2. Step 2: Convert to fraction form
    93,239.30/139,530.90 = 85,366.10/x
  3. Step 3: Cross multiply
    93,239.30x = 139,530.90 × 85,366.10
  4. Step 4: Simplify right side
    93,239.30x = 11,911,208,762.49
  5. Step 5: Solve for x
    x = 11,911,208,762.49/93,239.30
  6. Step 6: Final answer
    x = 127,748.80

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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.