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Finding the Fourth Proportional to 98,112.80, 147,169.20 and 70,464.80

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Solution

The fourth proportional to 98,112.80, 147,169.20 and 70,464.80 is: 105,697.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,112.80 : 147,169.20 = 70,464.80 : x
  2. Step 2: Convert to fraction form
    98,112.80/147,169.20 = 70,464.80/x
  3. Step 3: Cross multiply
    98,112.80x = 147,169.20 × 70,464.80
  4. Step 4: Simplify right side
    98,112.80x = 10,370,248,244.16
  5. Step 5: Solve for x
    x = 10,370,248,244.16/98,112.80
  6. Step 6: Final answer
    x = 105,697.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.