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Finding the Fourth Proportional to 116,710.80, 174,920.40 and 85,509.60

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Solution

The fourth proportional to 116,710.80, 174,920.40 and 85,509.60 is: 128,157.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,710.80 : 174,920.40 = 85,509.60 : x
  2. Step 2: Convert to fraction form
    116,710.80/174,920.40 = 85,509.60/x
  3. Step 3: Cross multiply
    116,710.80x = 174,920.40 × 85,509.60
  4. Step 4: Simplify right side
    116,710.80x = 14,957,373,435.84
  5. Step 5: Solve for x
    x = 14,957,373,435.84/116,710.80
  6. Step 6: Final answer
    x = 128,157.58

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1.5x scale

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.