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Finding the Fourth Proportional to 141,794.55, 212,491.35 and 78,642.50

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Solution

The fourth proportional to 141,794.55, 212,491.35 and 78,642.50 is: 117,852.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,794.55 : 212,491.35 = 78,642.50 : x
  2. Step 2: Convert to fraction form
    141,794.55/212,491.35 = 78,642.50/x
  3. Step 3: Cross multiply
    141,794.55x = 212,491.35 × 78,642.50
  4. Step 4: Simplify right side
    141,794.55x = 16,710,849,929.92
  5. Step 5: Solve for x
    x = 16,710,849,929.92/141,794.55
  6. Step 6: Final answer
    x = 117,852.55

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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.