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Finding the Fourth Proportional to 154,701.89, 213,498.47 and 86,718.89

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Solution

The fourth proportional to 154,701.89, 213,498.47 and 86,718.89 is: 119,677.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,701.89 : 213,498.47 = 86,718.89 : x
  2. Step 2: Convert to fraction form
    154,701.89/213,498.47 = 86,718.89/x
  3. Step 3: Cross multiply
    154,701.89x = 213,498.47 × 86,718.89
  4. Step 4: Simplify right side
    154,701.89x = 18,514,348,834.01
  5. Step 5: Solve for x
    x = 18,514,348,834.01/154,701.89
  6. Step 6: Final answer
    x = 119,677.59

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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.