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Finding the Fourth Proportional to 77,292.68, 106,878.69 and 61,349.45

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Solution

The fourth proportional to 77,292.68, 106,878.69 and 61,349.45 is: 84,832.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,292.68 : 106,878.69 = 61,349.45 : x
  2. Step 2: Convert to fraction form
    77,292.68/106,878.69 = 61,349.45/x
  3. Step 3: Cross multiply
    77,292.68x = 106,878.69 × 61,349.45
  4. Step 4: Simplify right side
    77,292.68x = 6,556,948,915.02
  5. Step 5: Solve for x
    x = 6,556,948,915.02/77,292.68
  6. Step 6: Final answer
    x = 84,832.73

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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.