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Finding the Fourth Proportional to 145,289.76, 200,505 and 81,626.28

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Solution

The fourth proportional to 145,289.76, 200,505 and 81,626.28 is: 112,647.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,289.76 : 200,505 = 81,626.28 : x
  2. Step 2: Convert to fraction form
    145,289.76/200,505 = 81,626.28/x
  3. Step 3: Cross multiply
    145,289.76x = 200,505 × 81,626.28
  4. Step 4: Simplify right side
    145,289.76x = 16,366,477,271.40
  5. Step 5: Solve for x
    x = 16,366,477,271.40/145,289.76
  6. Step 6: Final answer
    x = 112,647.15

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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.