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Finding the Fourth Proportional to 118,740.47, 163,860.62 and 64,291.71

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Solution

The fourth proportional to 118,740.47, 163,860.62 and 64,291.71 is: 88,721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,740.47 : 163,860.62 = 64,291.71 : x
  2. Step 2: Convert to fraction form
    118,740.47/163,860.62 = 64,291.71/x
  3. Step 3: Cross multiply
    118,740.47x = 163,860.62 × 64,291.71
  4. Step 4: Simplify right side
    118,740.47x = 10,534,878,642.16
  5. Step 5: Solve for x
    x = 10,534,878,642.16/118,740.47
  6. Step 6: Final answer
    x = 88,721.89

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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.