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Finding the Fourth Proportional to 76,885.60, 115,328.40 and 65,610.40

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Solution

The fourth proportional to 76,885.60, 115,328.40 and 65,610.40 is: 98,415.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,885.60 : 115,328.40 = 65,610.40 : x
  2. Step 2: Convert to fraction form
    76,885.60/115,328.40 = 65,610.40/x
  3. Step 3: Cross multiply
    76,885.60x = 115,328.40 × 65,610.40
  4. Step 4: Simplify right side
    76,885.60x = 7,566,742,455.36
  5. Step 5: Solve for x
    x = 7,566,742,455.36/76,885.60
  6. Step 6: Final answer
    x = 98,415.60

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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.