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Finding the Fourth Proportional to 66,968.64, 92,417.76 and 38,678.40

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Solution

The fourth proportional to 66,968.64, 92,417.76 and 38,678.40 is: 53,376.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,968.64 : 92,417.76 = 38,678.40 : x
  2. Step 2: Convert to fraction form
    66,968.64/92,417.76 = 38,678.40/x
  3. Step 3: Cross multiply
    66,968.64x = 92,417.76 × 38,678.40
  4. Step 4: Simplify right side
    66,968.64x = 3,574,571,088.38
  5. Step 5: Solve for x
    x = 3,574,571,088.38/66,968.64
  6. Step 6: Final answer
    x = 53,376.79

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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.