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Finding the Fourth Proportional to 74,574.90, 102,915.52 and 40,585.58

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Solution

The fourth proportional to 74,574.90, 102,915.52 and 40,585.58 is: 56,009.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,574.90 : 102,915.52 = 40,585.58 : x
  2. Step 2: Convert to fraction form
    74,574.90/102,915.52 = 40,585.58/x
  3. Step 3: Cross multiply
    74,574.90x = 102,915.52 × 40,585.58
  4. Step 4: Simplify right side
    74,574.90x = 4,176,886,070.20
  5. Step 5: Solve for x
    x = 4,176,886,070.20/74,574.90
  6. Step 6: Final answer
    x = 56,009.27

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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.