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Finding the Fourth Proportional to 133,113.50, 183,695.90 and 72,683.72

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Solution

The fourth proportional to 133,113.50, 183,695.90 and 72,683.72 is: 100,303.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,113.50 : 183,695.90 = 72,683.72 : x
  2. Step 2: Convert to fraction form
    133,113.50/183,695.90 = 72,683.72/x
  3. Step 3: Cross multiply
    133,113.50x = 183,695.90 × 72,683.72
  4. Step 4: Simplify right side
    133,113.50x = 13,351,701,071.55
  5. Step 5: Solve for x
    x = 13,351,701,071.55/133,113.50
  6. Step 6: Final answer
    x = 100,303.13

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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.