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Finding the Fourth Proportional to 74,145.60, 102,309.60 and 42,316.80

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Solution

The fourth proportional to 74,145.60, 102,309.60 and 42,316.80 is: 58,390.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,145.60 : 102,309.60 = 42,316.80 : x
  2. Step 2: Convert to fraction form
    74,145.60/102,309.60 = 42,316.80/x
  3. Step 3: Cross multiply
    74,145.60x = 102,309.60 × 42,316.80
  4. Step 4: Simplify right side
    74,145.60x = 4,329,414,881.28
  5. Step 5: Solve for x
    x = 4,329,414,881.28/74,145.60
  6. Step 6: Final answer
    x = 58,390.72

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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.