Home / 86,913.60-130,370.40-78,165.60

Finding the Fourth Proportional to 86,913.60, 130,370.40 and 78,165.60

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Solution

The fourth proportional to 86,913.60, 130,370.40 and 78,165.60 is: 117,248.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,913.60 : 130,370.40 = 78,165.60 : x
  2. Step 2: Convert to fraction form
    86,913.60/130,370.40 = 78,165.60/x
  3. Step 3: Cross multiply
    86,913.60x = 130,370.40 × 78,165.60
  4. Step 4: Simplify right side
    86,913.60x = 10,190,480,538.24
  5. Step 5: Solve for x
    x = 10,190,480,538.24/86,913.60
  6. Step 6: Final answer
    x = 117,248.40

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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.