Home / 115,511.12-159,480.32-103,390.58

Finding the Fourth Proportional to 115,511.12, 159,480.32 and 103,390.58

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Solution

The fourth proportional to 115,511.12, 159,480.32 and 103,390.58 is: 142,746.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,511.12 : 159,480.32 = 103,390.58 : x
  2. Step 2: Convert to fraction form
    115,511.12/159,480.32 = 103,390.58/x
  3. Step 3: Cross multiply
    115,511.12x = 159,480.32 × 103,390.58
  4. Step 4: Simplify right side
    115,511.12x = 16,488,762,665.13
  5. Step 5: Solve for x
    x = 16,488,762,665.13/115,511.12
  6. Step 6: Final answer
    x = 142,746.10

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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.