Home / 89,971.20-134,870.40-69,969.60

Finding the Fourth Proportional to 89,971.20, 134,870.40 and 69,969.60

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Solution

The fourth proportional to 89,971.20, 134,870.40 and 69,969.60 is: 104,887.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,971.20 : 134,870.40 = 69,969.60 : x
  2. Step 2: Convert to fraction form
    89,971.20/134,870.40 = 69,969.60/x
  3. Step 3: Cross multiply
    89,971.20x = 134,870.40 × 69,969.60
  4. Step 4: Simplify right side
    89,971.20x = 9,436,827,939.84
  5. Step 5: Solve for x
    x = 9,436,827,939.84/89,971.20
  6. Step 6: Final answer
    x = 104,887.21

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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.