Home / 156,970.55-235,455.83-78,238.55

Finding the Fourth Proportional to 156,970.55, 235,455.83 and 78,238.55

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Solution

The fourth proportional to 156,970.55, 235,455.83 and 78,238.55 is: 117,357.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,970.55 : 235,455.83 = 78,238.55 : x
  2. Step 2: Convert to fraction form
    156,970.55/235,455.83 = 78,238.55/x
  3. Step 3: Cross multiply
    156,970.55x = 235,455.83 × 78,238.55
  4. Step 4: Simplify right side
    156,970.55x = 18,421,722,728.25
  5. Step 5: Solve for x
    x = 18,421,722,728.25/156,970.55
  6. Step 6: Final answer
    x = 117,357.83

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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.