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Finding the Fourth Proportional to 92,870.50, 128,161.29 and 53,126.50

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Solution

The fourth proportional to 92,870.50, 128,161.29 and 53,126.50 is: 73,314.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,870.50 : 128,161.29 = 53,126.50 : x
  2. Step 2: Convert to fraction form
    92,870.50/128,161.29 = 53,126.50/x
  3. Step 3: Cross multiply
    92,870.50x = 128,161.29 × 53,126.50
  4. Step 4: Simplify right side
    92,870.50x = 6,808,760,773.19
  5. Step 5: Solve for x
    x = 6,808,760,773.19/92,870.50
  6. Step 6: Final answer
    x = 73,314.57

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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.