Home / 105,053.20-145,005.76-64,779.60

Finding the Fourth Proportional to 105,053.20, 145,005.76 and 64,779.60

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Solution

The fourth proportional to 105,053.20, 145,005.76 and 64,779.60 is: 89,415.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,053.20 : 145,005.76 = 64,779.60 : x
  2. Step 2: Convert to fraction form
    105,053.20/145,005.76 = 64,779.60/x
  3. Step 3: Cross multiply
    105,053.20x = 145,005.76 × 64,779.60
  4. Step 4: Simplify right side
    105,053.20x = 9,393,415,130.50
  5. Step 5: Solve for x
    x = 9,393,415,130.50/105,053.20
  6. Step 6: Final answer
    x = 89,415.79

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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.