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Finding the Fourth Proportional to 118,830.40, 163,970.40 and 71,066.32

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Solution

The fourth proportional to 118,830.40, 163,970.40 and 71,066.32 is: 98,062.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,830.40 : 163,970.40 = 71,066.32 : x
  2. Step 2: Convert to fraction form
    118,830.40/163,970.40 = 71,066.32/x
  3. Step 3: Cross multiply
    118,830.40x = 163,970.40 × 71,066.32
  4. Step 4: Simplify right side
    118,830.40x = 11,652,772,916.93
  5. Step 5: Solve for x
    x = 11,652,772,916.93/118,830.40
  6. Step 6: Final answer
    x = 98,062.22

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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.