Home / 82,130.57-123,403.45-78,809.07

Finding the Fourth Proportional to 82,130.57, 123,403.45 and 78,809.07

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Solution

The fourth proportional to 82,130.57, 123,403.45 and 78,809.07 is: 118,412.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,130.57 : 123,403.45 = 78,809.07 : x
  2. Step 2: Convert to fraction form
    82,130.57/123,403.45 = 78,809.07/x
  3. Step 3: Cross multiply
    82,130.57x = 123,403.45 × 78,809.07
  4. Step 4: Simplify right side
    82,130.57x = 9,725,311,129.29
  5. Step 5: Solve for x
    x = 9,725,311,129.29/82,130.57
  6. Step 6: Final answer
    x = 118,412.80

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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.