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Finding the Fourth Proportional to 62,398, 86,079.14 and 40,878.40

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Solution

The fourth proportional to 62,398, 86,079.14 and 40,878.40 is: 56,392.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,398 : 86,079.14 = 40,878.40 : x
  2. Step 2: Convert to fraction form
    62,398/86,079.14 = 40,878.40/x
  3. Step 3: Cross multiply
    62,398x = 86,079.14 × 40,878.40
  4. Step 4: Simplify right side
    62,398x = 3,518,776,881.79
  5. Step 5: Solve for x
    x = 3,518,776,881.79/62,398
  6. Step 6: Final answer
    x = 56,392.46

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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.