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Finding the Fourth Proportional to 153,074.88, 211,243.20 and 85,089.72

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Solution

The fourth proportional to 153,074.88, 211,243.20 and 85,089.72 is: 117,423.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,074.88 : 211,243.20 = 85,089.72 : x
  2. Step 2: Convert to fraction form
    153,074.88/211,243.20 = 85,089.72/x
  3. Step 3: Cross multiply
    153,074.88x = 211,243.20 × 85,089.72
  4. Step 4: Simplify right side
    153,074.88x = 17,974,624,739.90
  5. Step 5: Solve for x
    x = 17,974,624,739.90/153,074.88
  6. Step 6: Final answer
    x = 117,423.74

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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.