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Finding the Fourth Proportional to 126,430.87, 174,509.37 and 78,655.72

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Solution

The fourth proportional to 126,430.87, 174,509.37 and 78,655.72 is: 108,566.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,430.87 : 174,509.37 = 78,655.72 : x
  2. Step 2: Convert to fraction form
    126,430.87/174,509.37 = 78,655.72/x
  3. Step 3: Cross multiply
    126,430.87x = 174,509.37 × 78,655.72
  4. Step 4: Simplify right side
    126,430.87x = 13,726,160,144.10
  5. Step 5: Solve for x
    x = 13,726,160,144.10/126,430.87
  6. Step 6: Final answer
    x = 108,566.52

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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.