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Finding the Fourth Proportional to 70,689.83, 97,551.95 and 40,485.15

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Solution

The fourth proportional to 70,689.83, 97,551.95 and 40,485.15 is: 55,869.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,689.83 : 97,551.95 = 40,485.15 : x
  2. Step 2: Convert to fraction form
    70,689.83/97,551.95 = 40,485.15/x
  3. Step 3: Cross multiply
    70,689.83x = 97,551.95 × 40,485.15
  4. Step 4: Simplify right side
    70,689.83x = 3,949,405,126.12
  5. Step 5: Solve for x
    x = 3,949,405,126.12/70,689.83
  6. Step 6: Final answer
    x = 55,869.50

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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.