Home / 105,120.12-145,043.60-66,865.76

Finding the Fourth Proportional to 105,120.12, 145,043.60 and 66,865.76

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Solution

The fourth proportional to 105,120.12, 145,043.60 and 66,865.76 is: 92,260.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,120.12 : 145,043.60 = 66,865.76 : x
  2. Step 2: Convert to fraction form
    105,120.12/145,043.60 = 66,865.76/x
  3. Step 3: Cross multiply
    105,120.12x = 145,043.60 × 66,865.76
  4. Step 4: Simplify right side
    105,120.12x = 9,698,450,547.14
  5. Step 5: Solve for x
    x = 9,698,450,547.14/105,120.12
  6. Step 6: Final answer
    x = 92,260.65

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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.