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Finding the Fourth Proportional to 71,772,258.80, 107,683,271.40 and 31,411,708.40

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Solution

The fourth proportional to 71,772,258.80, 107,683,271.40 and 31,411,708.40 is: 47,128,452.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,772,258.80 : 107,683,271.40 = 31,411,708.40 : x
  2. Step 2: Convert to fraction form
    71,772,258.80/107,683,271.40 = 31,411,708.40/x
  3. Step 3: Cross multiply
    71,772,258.80x = 107,683,271.40 × 31,411,708.40
  4. Step 4: Simplify right side
    71,772,258.80x = 3,382,515,520,774,860
  5. Step 5: Solve for x
    x = 3,382,515,520,774,860/71,772,258.80
  6. Step 6: Final answer
    x = 47,128,452.93

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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.