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Finding the Fourth Proportional to 61,521.51, 84,860.32 and 38,820.45

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Solution

The fourth proportional to 61,521.51, 84,860.32 and 38,820.45 is: 53,547.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,521.51 : 84,860.32 = 38,820.45 : x
  2. Step 2: Convert to fraction form
    61,521.51/84,860.32 = 38,820.45/x
  3. Step 3: Cross multiply
    61,521.51x = 84,860.32 × 38,820.45
  4. Step 4: Simplify right side
    61,521.51x = 3,294,315,809.54
  5. Step 5: Solve for x
    x = 3,294,315,809.54/61,521.51
  6. Step 6: Final answer
    x = 53,547.38

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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.