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Finding the Fourth Proportional to 210,159.60, 315,268.20 and 69,903.60

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Solution

The fourth proportional to 210,159.60, 315,268.20 and 69,903.60 is: 104,864.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,159.60 : 315,268.20 = 69,903.60 : x
  2. Step 2: Convert to fraction form
    210,159.60/315,268.20 = 69,903.60/x
  3. Step 3: Cross multiply
    210,159.60x = 315,268.20 × 69,903.60
  4. Step 4: Simplify right side
    210,159.60x = 22,038,382,145.52
  5. Step 5: Solve for x
    x = 22,038,382,145.52/210,159.60
  6. Step 6: Final answer
    x = 104,864.98

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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.