Home / 78,885.60-118,339.20-26,289.60

Finding the Fourth Proportional to 78,885.60, 118,339.20 and 26,289.60

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Solution

The fourth proportional to 78,885.60, 118,339.20 and 26,289.60 is: 39,438.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,885.60 : 118,339.20 = 26,289.60 : x
  2. Step 2: Convert to fraction form
    78,885.60/118,339.20 = 26,289.60/x
  3. Step 3: Cross multiply
    78,885.60x = 118,339.20 × 26,289.60
  4. Step 4: Simplify right side
    78,885.60x = 3,111,090,232.32
  5. Step 5: Solve for x
    x = 3,111,090,232.32/78,885.60
  6. Step 6: Final answer
    x = 39,438.00

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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.