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Finding the Fourth Proportional to 93,342.10, 139,903.80 and 69,941.20

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Solution

The fourth proportional to 93,342.10, 139,903.80 and 69,941.20 is: 104,829.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,342.10 : 139,903.80 = 69,941.20 : x
  2. Step 2: Convert to fraction form
    93,342.10/139,903.80 = 69,941.20/x
  3. Step 3: Cross multiply
    93,342.10x = 139,903.80 × 69,941.20
  4. Step 4: Simplify right side
    93,342.10x = 9,785,039,656.56
  5. Step 5: Solve for x
    x = 9,785,039,656.56/93,342.10
  6. Step 6: Final answer
    x = 104,829.86

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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.