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Finding the Fourth Proportional to 91,423, 125,900.60 and 75,359.84

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Solution

The fourth proportional to 91,423, 125,900.60 and 75,359.84 is: 103,779.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,423 : 125,900.60 = 75,359.84 : x
  2. Step 2: Convert to fraction form
    91,423/125,900.60 = 75,359.84/x
  3. Step 3: Cross multiply
    91,423x = 125,900.60 × 75,359.84
  4. Step 4: Simplify right side
    91,423x = 9,487,849,071.90
  5. Step 5: Solve for x
    x = 9,487,849,071.90/91,423
  6. Step 6: Final answer
    x = 103,779.67

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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.