Home / 78,840.30-118,030.05-76,536.30

Finding the Fourth Proportional to 78,840.30, 118,030.05 and 76,536.30

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Solution

The fourth proportional to 78,840.30, 118,030.05 and 76,536.30 is: 114,580.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.30 : 118,030.05 = 76,536.30 : x
  2. Step 2: Convert to fraction form
    78,840.30/118,030.05 = 76,536.30/x
  3. Step 3: Cross multiply
    78,840.30x = 118,030.05 × 76,536.30
  4. Step 4: Simplify right side
    78,840.30x = 9,033,583,315.82
  5. Step 5: Solve for x
    x = 9,033,583,315.82/78,840.30
  6. Step 6: Final answer
    x = 114,580.78

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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.