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Finding the Fourth Proportional to 91,806.60, 137,709.90 and 88,307.40

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Solution

The fourth proportional to 91,806.60, 137,709.90 and 88,307.40 is: 132,461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,806.60 : 137,709.90 = 88,307.40 : x
  2. Step 2: Convert to fraction form
    91,806.60/137,709.90 = 88,307.40/x
  3. Step 3: Cross multiply
    91,806.60x = 137,709.90 × 88,307.40
  4. Step 4: Simplify right side
    91,806.60x = 12,160,803,223.26
  5. Step 5: Solve for x
    x = 12,160,803,223.26/91,806.60
  6. Step 6: Final answer
    x = 132,461.10

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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.