Home / 90,500.87-124,448.32-78,543.45

Finding the Fourth Proportional to 90,500.87, 124,448.32 and 78,543.45

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Solution

The fourth proportional to 90,500.87, 124,448.32 and 78,543.45 is: 108,005.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,500.87 : 124,448.32 = 78,543.45 : x
  2. Step 2: Convert to fraction form
    90,500.87/124,448.32 = 78,543.45/x
  3. Step 3: Cross multiply
    90,500.87x = 124,448.32 × 78,543.45
  4. Step 4: Simplify right side
    90,500.87x = 9,774,600,399.50
  5. Step 5: Solve for x
    x = 9,774,600,399.50/90,500.87
  6. Step 6: Final answer
    x = 108,005.60

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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.