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Finding the Fourth Proportional to 153,495.05, 211,806.72 and 85,498.92

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Solution

The fourth proportional to 153,495.05, 211,806.72 and 85,498.92 is: 117,979.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,495.05 : 211,806.72 = 85,498.92 : x
  2. Step 2: Convert to fraction form
    153,495.05/211,806.72 = 85,498.92/x
  3. Step 3: Cross multiply
    153,495.05x = 211,806.72 × 85,498.92
  4. Step 4: Simplify right side
    153,495.05x = 18,109,245,808.74
  5. Step 5: Solve for x
    x = 18,109,245,808.74/153,495.05
  6. Step 6: Final answer
    x = 117,979.35

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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.