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Finding the Fourth Proportional to 145,830.90, 201,246.66 and 78,762.90

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Solution

The fourth proportional to 145,830.90, 201,246.66 and 78,762.90 is: 108,692.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,830.90 : 201,246.66 = 78,762.90 : x
  2. Step 2: Convert to fraction form
    145,830.90/201,246.66 = 78,762.90/x
  3. Step 3: Cross multiply
    145,830.90x = 201,246.66 × 78,762.90
  4. Step 4: Simplify right side
    145,830.90x = 15,850,770,556.91
  5. Step 5: Solve for x
    x = 15,850,770,556.91/145,830.90
  6. Step 6: Final answer
    x = 108,692.81

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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.