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Finding the Fourth Proportional to 113,790.40, 156,957.64 and 69,078.40

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Solution

The fourth proportional to 113,790.40, 156,957.64 and 69,078.40 is: 95,283.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,790.40 : 156,957.64 = 69,078.40 : x
  2. Step 2: Convert to fraction form
    113,790.40/156,957.64 = 69,078.40/x
  3. Step 3: Cross multiply
    113,790.40x = 156,957.64 × 69,078.40
  4. Step 4: Simplify right side
    113,790.40x = 10,842,382,638.98
  5. Step 5: Solve for x
    x = 10,842,382,638.98/113,790.40
  6. Step 6: Final answer
    x = 95,283.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.