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Finding the Fourth Proportional to 86,719.40, 130,103.40 and 42,347.60

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Solution

The fourth proportional to 86,719.40, 130,103.40 and 42,347.60 is: 63,533.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,719.40 : 130,103.40 = 42,347.60 : x
  2. Step 2: Convert to fraction form
    86,719.40/130,103.40 = 42,347.60/x
  3. Step 3: Cross multiply
    86,719.40x = 130,103.40 × 42,347.60
  4. Step 4: Simplify right side
    86,719.40x = 5,509,566,741.84
  5. Step 5: Solve for x
    x = 5,509,566,741.84/86,719.40
  6. Step 6: Final answer
    x = 63,533.27

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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.