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Finding the Fourth Proportional to 126,370.92, 174,430.48 and 77,987.64

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Solution

The fourth proportional to 126,370.92, 174,430.48 and 77,987.64 is: 107,646.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,370.92 : 174,430.48 = 77,987.64 : x
  2. Step 2: Convert to fraction form
    126,370.92/174,430.48 = 77,987.64/x
  3. Step 3: Cross multiply
    126,370.92x = 174,430.48 × 77,987.64
  4. Step 4: Simplify right side
    126,370.92x = 13,603,421,479.27
  5. Step 5: Solve for x
    x = 13,603,421,479.27/126,370.92
  6. Step 6: Final answer
    x = 107,646.77

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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.