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Finding the Fourth Proportional to 139,148.80, 208,492.80 and 118,412.80

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Solution

The fourth proportional to 139,148.80, 208,492.80 and 118,412.80 is: 177,423.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,148.80 : 208,492.80 = 118,412.80 : x
  2. Step 2: Convert to fraction form
    139,148.80/208,492.80 = 118,412.80/x
  3. Step 3: Cross multiply
    139,148.80x = 208,492.80 × 118,412.80
  4. Step 4: Simplify right side
    139,148.80x = 24,688,216,227.84
  5. Step 5: Solve for x
    x = 24,688,216,227.84/139,148.80
  6. Step 6: Final answer
    x = 177,423.13

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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.