Home / 90,501.12-124,448.66-78,543.70

Finding the Fourth Proportional to 90,501.12, 124,448.66 and 78,543.70

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Solution

The fourth proportional to 90,501.12, 124,448.66 and 78,543.70 is: 108,005.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,501.12 : 124,448.66 = 78,543.70 : x
  2. Step 2: Convert to fraction form
    90,501.12/124,448.66 = 78,543.70/x
  3. Step 3: Cross multiply
    90,501.12x = 124,448.66 × 78,543.70
  4. Step 4: Simplify right side
    90,501.12x = 9,774,658,216.44
  5. Step 5: Solve for x
    x = 9,774,658,216.44/90,501.12
  6. Step 6: Final answer
    x = 108,005.94

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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.