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Finding the Fourth Proportional to 61,878.96, 85,388.16 and 36,386.32

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Solution

The fourth proportional to 61,878.96, 85,388.16 and 36,386.32 is: 50,210.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,878.96 : 85,388.16 = 36,386.32 : x
  2. Step 2: Convert to fraction form
    61,878.96/85,388.16 = 36,386.32/x
  3. Step 3: Cross multiply
    61,878.96x = 85,388.16 × 36,386.32
  4. Step 4: Simplify right side
    61,878.96x = 3,106,960,913.97
  5. Step 5: Solve for x
    x = 3,106,960,913.97/61,878.96
  6. Step 6: Final answer
    x = 50,210.30

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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.