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Finding the Fourth Proportional to 81,953.40, 122,925.24 and 28,641.63

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Solution

The fourth proportional to 81,953.40, 122,925.24 and 28,641.63 is: 42,960.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,953.40 : 122,925.24 = 28,641.63 : x
  2. Step 2: Convert to fraction form
    81,953.40/122,925.24 = 28,641.63/x
  3. Step 3: Cross multiply
    81,953.40x = 122,925.24 × 28,641.63
  4. Step 4: Simplify right side
    81,953.40x = 3,520,779,241.74
  5. Step 5: Solve for x
    x = 3,520,779,241.74/81,953.40
  6. Step 6: Final answer
    x = 42,960.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.