Home / 156,938.30-235,407.45-78,206.30

Finding the Fourth Proportional to 156,938.30, 235,407.45 and 78,206.30

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Solution

The fourth proportional to 156,938.30, 235,407.45 and 78,206.30 is: 117,309.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,938.30 : 235,407.45 = 78,206.30 : x
  2. Step 2: Convert to fraction form
    156,938.30/235,407.45 = 78,206.30/x
  3. Step 3: Cross multiply
    156,938.30x = 235,407.45 × 78,206.30
  4. Step 4: Simplify right side
    156,938.30x = 18,410,345,656.94
  5. Step 5: Solve for x
    x = 18,410,345,656.94/156,938.30
  6. Step 6: Final answer
    x = 117,309.45

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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.