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Finding the Fourth Proportional to 156,739.80, 216,300.24 and 85,119.24

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Solution

The fourth proportional to 156,739.80, 216,300.24 and 85,119.24 is: 117,464.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,739.80 : 216,300.24 = 85,119.24 : x
  2. Step 2: Convert to fraction form
    156,739.80/216,300.24 = 85,119.24/x
  3. Step 3: Cross multiply
    156,739.80x = 216,300.24 × 85,119.24
  4. Step 4: Simplify right side
    156,739.80x = 18,411,312,040.62
  5. Step 5: Solve for x
    x = 18,411,312,040.62/156,739.80
  6. Step 6: Final answer
    x = 117,464.18

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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.