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Finding the Fourth Proportional to 56,459.94, 77,915.13 and 38,554.47

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Solution

The fourth proportional to 56,459.94, 77,915.13 and 38,554.47 is: 53,205.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,459.94 : 77,915.13 = 38,554.47 : x
  2. Step 2: Convert to fraction form
    56,459.94/77,915.13 = 38,554.47/x
  3. Step 3: Cross multiply
    56,459.94x = 77,915.13 × 38,554.47
  4. Step 4: Simplify right side
    56,459.94x = 3,003,976,542.13
  5. Step 5: Solve for x
    x = 3,003,976,542.13/56,459.94
  6. Step 6: Final answer
    x = 53,205.45

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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.