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Finding the Fourth Proportional to 154,641.86, 213,420.72 and 86,670.30

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Solution

The fourth proportional to 154,641.86, 213,420.72 and 86,670.30 is: 119,613.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,641.86 : 213,420.72 = 86,670.30 : x
  2. Step 2: Convert to fraction form
    154,641.86/213,420.72 = 86,670.30/x
  3. Step 3: Cross multiply
    154,641.86x = 213,420.72 × 86,670.30
  4. Step 4: Simplify right side
    154,641.86x = 18,497,238,953.96
  5. Step 5: Solve for x
    x = 18,497,238,953.96/154,641.86
  6. Step 6: Final answer
    x = 119,613.40

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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.