Home / 156,971.55-235,457.33-78,239.55

Finding the Fourth Proportional to 156,971.55, 235,457.33 and 78,239.55

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Solution

The fourth proportional to 156,971.55, 235,457.33 and 78,239.55 is: 117,359.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,971.55 : 235,457.33 = 78,239.55 : x
  2. Step 2: Convert to fraction form
    156,971.55/235,457.33 = 78,239.55/x
  3. Step 3: Cross multiply
    156,971.55x = 235,457.33 × 78,239.55
  4. Step 4: Simplify right side
    156,971.55x = 18,422,075,543.40
  5. Step 5: Solve for x
    x = 18,422,075,543.40/156,971.55
  6. Step 6: Final answer
    x = 117,359.33

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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.