Home / 112,345.16-154,772.61-78,291.74

Finding the Fourth Proportional to 112,345.16, 154,772.61 and 78,291.74

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Solution

The fourth proportional to 112,345.16, 154,772.61 and 78,291.74 is: 107,858.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,345.16 : 154,772.61 = 78,291.74 : x
  2. Step 2: Convert to fraction form
    112,345.16/154,772.61 = 78,291.74/x
  3. Step 3: Cross multiply
    112,345.16x = 154,772.61 × 78,291.74
  4. Step 4: Simplify right side
    112,345.16x = 12,117,416,941.24
  5. Step 5: Solve for x
    x = 12,117,416,941.24/112,345.16
  6. Step 6: Final answer
    x = 107,858.83

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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.