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Finding the Fourth Proportional to 78,080.40, 107,749.67 and 42,270.10

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Solution

The fourth proportional to 78,080.40, 107,749.67 and 42,270.10 is: 58,332.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,080.40 : 107,749.67 = 42,270.10 : x
  2. Step 2: Convert to fraction form
    78,080.40/107,749.67 = 42,270.10/x
  3. Step 3: Cross multiply
    78,080.40x = 107,749.67 × 42,270.10
  4. Step 4: Simplify right side
    78,080.40x = 4,554,588,845.14
  5. Step 5: Solve for x
    x = 4,554,588,845.14/78,080.40
  6. Step 6: Final answer
    x = 58,332.04

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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.