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Finding the Fourth Proportional to 101,485.40, 140,106.16 and 61,209.32

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Solution

The fourth proportional to 101,485.40, 140,106.16 and 61,209.32 is: 84,502.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,485.40 : 140,106.16 = 61,209.32 : x
  2. Step 2: Convert to fraction form
    101,485.40/140,106.16 = 61,209.32/x
  3. Step 3: Cross multiply
    101,485.40x = 140,106.16 × 61,209.32
  4. Step 4: Simplify right side
    101,485.40x = 8,575,802,781.41
  5. Step 5: Solve for x
    x = 8,575,802,781.41/101,485.40
  6. Step 6: Final answer
    x = 84,502.82

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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.