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Finding the Fourth Proportional to 101,454.40, 140,005.80 and 56,128.84

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Solution

The fourth proportional to 101,454.40, 140,005.80 and 56,128.84 is: 77,457.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,454.40 : 140,005.80 = 56,128.84 : x
  2. Step 2: Convert to fraction form
    101,454.40/140,005.80 = 56,128.84/x
  3. Step 3: Cross multiply
    101,454.40x = 140,005.80 × 56,128.84
  4. Step 4: Simplify right side
    101,454.40x = 7,858,363,147.27
  5. Step 5: Solve for x
    x = 7,858,363,147.27/101,454.40
  6. Step 6: Final answer
    x = 77,457.10

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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.