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Finding the Fourth Proportional to 74,878.71, 103,331.23 and 40,886.27

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Solution

The fourth proportional to 74,878.71, 103,331.23 and 40,886.27 is: 56,422.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,878.71 : 103,331.23 = 40,886.27 : x
  2. Step 2: Convert to fraction form
    74,878.71/103,331.23 = 40,886.27/x
  3. Step 3: Cross multiply
    74,878.71x = 103,331.23 × 40,886.27
  4. Step 4: Simplify right side
    74,878.71x = 4,224,828,569.21
  5. Step 5: Solve for x
    x = 4,224,828,569.21/74,878.71
  6. Step 6: Final answer
    x = 56,422.29

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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.