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Finding the Fourth Proportional to 92,561.41, 138,897.69 and 39,970.90

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Solution

The fourth proportional to 92,561.41, 138,897.69 and 39,970.90 is: 59,980.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,561.41 : 138,897.69 = 39,970.90 : x
  2. Step 2: Convert to fraction form
    92,561.41/138,897.69 = 39,970.90/x
  3. Step 3: Cross multiply
    92,561.41x = 138,897.69 × 39,970.90
  4. Step 4: Simplify right side
    92,561.41x = 5,551,865,677.22
  5. Step 5: Solve for x
    x = 5,551,865,677.22/92,561.41
  6. Step 6: Final answer
    x = 59,980.35

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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.