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Finding the Fourth Proportional to 77,420.61, 116,130.65 and 51,119.10

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Solution

The fourth proportional to 77,420.61, 116,130.65 and 51,119.10 is: 76,678.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,420.61 : 116,130.65 = 51,119.10 : x
  2. Step 2: Convert to fraction form
    77,420.61/116,130.65 = 51,119.10/x
  3. Step 3: Cross multiply
    77,420.61x = 116,130.65 × 51,119.10
  4. Step 4: Simplify right side
    77,420.61x = 5,936,494,054.82
  5. Step 5: Solve for x
    x = 5,936,494,054.82/77,420.61
  6. Step 6: Final answer
    x = 76,678.47

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1.5x scale

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.