Home / 121,678.56-168,775.47-118,441.80

Finding the Fourth Proportional to 121,678.56, 168,775.47 and 118,441.80

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Solution

The fourth proportional to 121,678.56, 168,775.47 and 118,441.80 is: 164,285.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,678.56 : 168,775.47 = 118,441.80 : x
  2. Step 2: Convert to fraction form
    121,678.56/168,775.47 = 118,441.80/x
  3. Step 3: Cross multiply
    121,678.56x = 168,775.47 × 118,441.80
  4. Step 4: Simplify right side
    121,678.56x = 19,990,070,462.65
  5. Step 5: Solve for x
    x = 19,990,070,462.65/121,678.56
  6. Step 6: Final answer
    x = 164,285.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.