Home / 72,019.48-99,386.90-40,188.35

Finding the Fourth Proportional to 72,019.48, 99,386.90 and 40,188.35

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Solution

The fourth proportional to 72,019.48, 99,386.90 and 40,188.35 is: 55,459.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,019.48 : 99,386.90 = 40,188.35 : x
  2. Step 2: Convert to fraction form
    72,019.48/99,386.90 = 40,188.35/x
  3. Step 3: Cross multiply
    72,019.48x = 99,386.90 × 40,188.35
  4. Step 4: Simplify right side
    72,019.48x = 3,994,195,720.85
  5. Step 5: Solve for x
    x = 3,994,195,720.85/72,019.48
  6. Step 6: Final answer
    x = 55,459.94

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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.