Home / 91,068.04-135,889.76-81,611.69

Finding the Fourth Proportional to 91,068.04, 135,889.76 and 81,611.69

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Solution

The fourth proportional to 91,068.04, 135,889.76 and 81,611.69 is: 121,779.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,068.04 : 135,889.76 = 81,611.69 : x
  2. Step 2: Convert to fraction form
    91,068.04/135,889.76 = 81,611.69/x
  3. Step 3: Cross multiply
    91,068.04x = 135,889.76 × 81,611.69
  4. Step 4: Simplify right side
    91,068.04x = 11,090,192,898.96
  5. Step 5: Solve for x
    x = 11,090,192,898.96/91,068.04
  6. Step 6: Final answer
    x = 121,779.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.