Home / 76,678.16-105,250.56-68,107.28

Finding the Fourth Proportional to 76,678.16, 105,250.56 and 68,107.28

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Solution

The fourth proportional to 76,678.16, 105,250.56 and 68,107.28 is: 93,485.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,678.16 : 105,250.56 = 68,107.28 : x
  2. Step 2: Convert to fraction form
    76,678.16/105,250.56 = 68,107.28/x
  3. Step 3: Cross multiply
    76,678.16x = 105,250.56 × 68,107.28
  4. Step 4: Simplify right side
    76,678.16x = 7,168,329,360.08
  5. Step 5: Solve for x
    x = 7,168,329,360.08/76,678.16
  6. Step 6: Final answer
    x = 93,485.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.