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Finding the Fourth Proportional to 157,492.40, 236,238.60 and 139,121.60

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Solution

The fourth proportional to 157,492.40, 236,238.60 and 139,121.60 is: 208,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,492.40 : 236,238.60 = 139,121.60 : x
  2. Step 2: Convert to fraction form
    157,492.40/236,238.60 = 139,121.60/x
  3. Step 3: Cross multiply
    157,492.40x = 236,238.60 × 139,121.60
  4. Step 4: Simplify right side
    157,492.40x = 32,865,892,013.76
  5. Step 5: Solve for x
    x = 32,865,892,013.76/157,492.40
  6. Step 6: Final answer
    x = 208,682.40

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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.