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Finding the Fourth Proportional to 113,709, 156,918.42 and 63,406.92

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Solution

The fourth proportional to 113,709, 156,918.42 and 63,406.92 is: 87,501.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,709 : 156,918.42 = 63,406.92 : x
  2. Step 2: Convert to fraction form
    113,709/156,918.42 = 63,406.92/x
  3. Step 3: Cross multiply
    113,709x = 156,918.42 × 63,406.92
  4. Step 4: Simplify right side
    113,709x = 9,949,713,703.47
  5. Step 5: Solve for x
    x = 9,949,713,703.47/113,709
  6. Step 6: Final answer
    x = 87,501.55

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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.