Home / 72,701.16-100,319.95-40,430.55

Finding the Fourth Proportional to 72,701.16, 100,319.95 and 40,430.55

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Solution

The fourth proportional to 72,701.16, 100,319.95 and 40,430.55 is: 55,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,701.16 : 100,319.95 = 40,430.55 : x
  2. Step 2: Convert to fraction form
    72,701.16/100,319.95 = 40,430.55/x
  3. Step 3: Cross multiply
    72,701.16x = 100,319.95 × 40,430.55
  4. Step 4: Simplify right side
    72,701.16x = 4,055,990,754.47
  5. Step 5: Solve for x
    x = 4,055,990,754.47/72,701.16
  6. Step 6: Final answer
    x = 55,789.90

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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.