Home / 78,830.70-118,246.05-75,720.30

Finding the Fourth Proportional to 78,830.70, 118,246.05 and 75,720.30

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Solution

The fourth proportional to 78,830.70, 118,246.05 and 75,720.30 is: 113,580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,830.70 : 118,246.05 = 75,720.30 : x
  2. Step 2: Convert to fraction form
    78,830.70/118,246.05 = 75,720.30/x
  3. Step 3: Cross multiply
    78,830.70x = 118,246.05 × 75,720.30
  4. Step 4: Simplify right side
    78,830.70x = 8,953,626,379.82
  5. Step 5: Solve for x
    x = 8,953,626,379.82/78,830.70
  6. Step 6: Final answer
    x = 113,580.45

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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.