Home / 153,421.67-211,721.23-85,439.45

Finding the Fourth Proportional to 153,421.67, 211,721.23 and 85,439.45

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Solution

The fourth proportional to 153,421.67, 211,721.23 and 85,439.45 is: 117,906.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,421.67 : 211,721.23 = 85,439.45 : x
  2. Step 2: Convert to fraction form
    153,421.67/211,721.23 = 85,439.45/x
  3. Step 3: Cross multiply
    153,421.67x = 211,721.23 × 85,439.45
  4. Step 4: Simplify right side
    153,421.67x = 18,089,345,444.52
  5. Step 5: Solve for x
    x = 18,089,345,444.52/153,421.67
  6. Step 6: Final answer
    x = 117,906.07

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1.5x scale

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.