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Finding the Fourth Proportional to 145,901.60, 201,344.16 and 78,833.60

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Solution

The fourth proportional to 145,901.60, 201,344.16 and 78,833.60 is: 108,790.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,901.60 : 201,344.16 = 78,833.60 : x
  2. Step 2: Convert to fraction form
    145,901.60/201,344.16 = 78,833.60/x
  3. Step 3: Cross multiply
    145,901.60x = 201,344.16 × 78,833.60
  4. Step 4: Simplify right side
    145,901.60x = 15,872,684,971.78
  5. Step 5: Solve for x
    x = 15,872,684,971.78/145,901.60
  6. Step 6: Final answer
    x = 108,790.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.