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Finding the Fourth Proportional to 78,840.60, 118,260.90 and 41,386.20

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Solution

The fourth proportional to 78,840.60, 118,260.90 and 41,386.20 is: 62,079.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.60 : 118,260.90 = 41,386.20 : x
  2. Step 2: Convert to fraction form
    78,840.60/118,260.90 = 41,386.20/x
  3. Step 3: Cross multiply
    78,840.60x = 118,260.90 × 41,386.20
  4. Step 4: Simplify right side
    78,840.60x = 4,894,369,259.58
  5. Step 5: Solve for x
    x = 4,894,369,259.58/78,840.60
  6. Step 6: Final answer
    x = 62,079.30

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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.