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Finding the Fourth Proportional to 102,428.80, 153,643.20 and 52,662.40

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Solution

The fourth proportional to 102,428.80, 153,643.20 and 52,662.40 is: 78,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,428.80 : 153,643.20 = 52,662.40 : x
  2. Step 2: Convert to fraction form
    102,428.80/153,643.20 = 52,662.40/x
  3. Step 3: Cross multiply
    102,428.80x = 153,643.20 × 52,662.40
  4. Step 4: Simplify right side
    102,428.80x = 8,091,219,655.68
  5. Step 5: Solve for x
    x = 8,091,219,655.68/102,428.80
  6. Step 6: Final answer
    x = 78,993.60

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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.