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Finding the Fourth Proportional to 70,911.90, 97,830.99 and 40,686.30

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Solution

The fourth proportional to 70,911.90, 97,830.99 and 40,686.30 is: 56,131.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,911.90 : 97,830.99 = 40,686.30 : x
  2. Step 2: Convert to fraction form
    70,911.90/97,830.99 = 40,686.30/x
  3. Step 3: Cross multiply
    70,911.90x = 97,830.99 × 40,686.30
  4. Step 4: Simplify right side
    70,911.90x = 3,980,381,008.44
  5. Step 5: Solve for x
    x = 3,980,381,008.44/70,911.90
  6. Step 6: Final answer
    x = 56,131.35

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1.5x scale

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.