Home / 156,665.60-235,071.30-81,870.20

Finding the Fourth Proportional to 156,665.60, 235,071.30 and 81,870.20

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Solution

The fourth proportional to 156,665.60, 235,071.30 and 81,870.20 is: 122,843.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,665.60 : 235,071.30 = 81,870.20 : x
  2. Step 2: Convert to fraction form
    156,665.60/235,071.30 = 81,870.20/x
  3. Step 3: Cross multiply
    156,665.60x = 235,071.30 × 81,870.20
  4. Step 4: Simplify right side
    156,665.60x = 19,245,334,345.26
  5. Step 5: Solve for x
    x = 19,245,334,345.26/156,665.60
  6. Step 6: Final answer
    x = 122,843.40

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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.