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Finding the Fourth Proportional to 53,681.40, 80,424.90 and 45,905.40

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Solution

The fourth proportional to 53,681.40, 80,424.90 and 45,905.40 is: 68,774.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,681.40 : 80,424.90 = 45,905.40 : x
  2. Step 2: Convert to fraction form
    53,681.40/80,424.90 = 45,905.40/x
  3. Step 3: Cross multiply
    53,681.40x = 80,424.90 × 45,905.40
  4. Step 4: Simplify right side
    53,681.40x = 3,691,937,204.46
  5. Step 5: Solve for x
    x = 3,691,937,204.46/53,681.40
  6. Step 6: Final answer
    x = 68,774.98

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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.