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Finding the Fourth Proportional to 113,033.10, 155,819.13 and 86,128.92

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Solution

The fourth proportional to 113,033.10, 155,819.13 and 86,128.92 is: 118,731.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,033.10 : 155,819.13 = 86,128.92 : x
  2. Step 2: Convert to fraction form
    113,033.10/155,819.13 = 86,128.92/x
  3. Step 3: Cross multiply
    113,033.10x = 155,819.13 × 86,128.92
  4. Step 4: Simplify right side
    113,033.10x = 13,420,533,382.24
  5. Step 5: Solve for x
    x = 13,420,533,382.24/113,033.10
  6. Step 6: Final answer
    x = 118,731.00

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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.