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Finding the Fourth Proportional to 154,449.51, 213,128.55 and 86,450.91

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Solution

The fourth proportional to 154,449.51, 213,128.55 and 86,450.91 is: 119,295.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,449.51 : 213,128.55 = 86,450.91 : x
  2. Step 2: Convert to fraction form
    154,449.51/213,128.55 = 86,450.91/x
  3. Step 3: Cross multiply
    154,449.51x = 213,128.55 × 86,450.91
  4. Step 4: Simplify right side
    154,449.51x = 18,425,157,094.48
  5. Step 5: Solve for x
    x = 18,425,157,094.48/154,449.51
  6. Step 6: Final answer
    x = 119,295.67

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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.