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Finding the Fourth Proportional to 70,587, 97,418.70 and 40,779

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Solution

The fourth proportional to 70,587, 97,418.70 and 40,779 is: 56,280.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,587 : 97,418.70 = 40,779 : x
  2. Step 2: Convert to fraction form
    70,587/97,418.70 = 40,779/x
  3. Step 3: Cross multiply
    70,587x = 97,418.70 × 40,779
  4. Step 4: Simplify right side
    70,587x = 3,972,637,167.30
  5. Step 5: Solve for x
    x = 3,972,637,167.30/70,587
  6. Step 6: Final answer
    x = 56,280.01

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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.