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Finding the Fourth Proportional to 78,681.84, 118,034.40 and 26,079.72

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Solution

The fourth proportional to 78,681.84, 118,034.40 and 26,079.72 is: 39,123.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,681.84 : 118,034.40 = 26,079.72 : x
  2. Step 2: Convert to fraction form
    78,681.84/118,034.40 = 26,079.72/x
  3. Step 3: Cross multiply
    78,681.84x = 118,034.40 × 26,079.72
  4. Step 4: Simplify right side
    78,681.84x = 3,078,304,102.37
  5. Step 5: Solve for x
    x = 3,078,304,102.37/78,681.84
  6. Step 6: Final answer
    x = 39,123.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.