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Finding the Fourth Proportional to 93,274.60, 139,911.90 and 78,840.40

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Solution

The fourth proportional to 93,274.60, 139,911.90 and 78,840.40 is: 118,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,274.60 : 139,911.90 = 78,840.40 : x
  2. Step 2: Convert to fraction form
    93,274.60/139,911.90 = 78,840.40/x
  3. Step 3: Cross multiply
    93,274.60x = 139,911.90 × 78,840.40
  4. Step 4: Simplify right side
    93,274.60x = 11,030,710,160.76
  5. Step 5: Solve for x
    x = 11,030,710,160.76/93,274.60
  6. Step 6: Final answer
    x = 118,260.60

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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.