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Finding the Fourth Proportional to 118,397.40, 163,391.61 and 70,678.44

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Solution

The fourth proportional to 118,397.40, 163,391.61 and 70,678.44 is: 97,538.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,397.40 : 163,391.61 = 70,678.44 : x
  2. Step 2: Convert to fraction form
    118,397.40/163,391.61 = 70,678.44/x
  3. Step 3: Cross multiply
    118,397.40x = 163,391.61 × 70,678.44
  4. Step 4: Simplify right side
    118,397.40x = 11,548,264,368.93
  5. Step 5: Solve for x
    x = 11,548,264,368.93/118,397.40
  6. Step 6: Final answer
    x = 97,538.16

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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.