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Finding the Fourth Proportional to 110,303.60, 165,455.40 and 85,420.40

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Solution

The fourth proportional to 110,303.60, 165,455.40 and 85,420.40 is: 128,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,303.60 : 165,455.40 = 85,420.40 : x
  2. Step 2: Convert to fraction form
    110,303.60/165,455.40 = 85,420.40/x
  3. Step 3: Cross multiply
    110,303.60x = 165,455.40 × 85,420.40
  4. Step 4: Simplify right side
    110,303.60x = 14,133,266,450.16
  5. Step 5: Solve for x
    x = 14,133,266,450.16/110,303.60
  6. Step 6: Final answer
    x = 128,130.60

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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.