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Finding the Fourth Proportional to 153,880.64, 212,359.64 and 85,896.20

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Solution

The fourth proportional to 153,880.64, 212,359.64 and 85,896.20 is: 118,539.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,880.64 : 212,359.64 = 85,896.20 : x
  2. Step 2: Convert to fraction form
    153,880.64/212,359.64 = 85,896.20/x
  3. Step 3: Cross multiply
    153,880.64x = 212,359.64 × 85,896.20
  4. Step 4: Simplify right side
    153,880.64x = 18,240,886,109.37
  5. Step 5: Solve for x
    x = 18,240,886,109.37/153,880.64
  6. Step 6: Final answer
    x = 118,539.19

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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.