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Finding the Fourth Proportional to 78,080.65, 107,750.01 and 42,270.36

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Solution

The fourth proportional to 78,080.65, 107,750.01 and 42,270.36 is: 58,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,080.65 : 107,750.01 = 42,270.36 : x
  2. Step 2: Convert to fraction form
    78,080.65/107,750.01 = 42,270.36/x
  3. Step 3: Cross multiply
    78,080.65x = 107,750.01 × 42,270.36
  4. Step 4: Simplify right side
    78,080.65x = 4,554,631,712.70
  5. Step 5: Solve for x
    x = 4,554,631,712.70/78,080.65
  6. Step 6: Final answer
    x = 58,332.40

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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.