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Finding the Fourth Proportional to 72,871,544.80, 109,291,570.80 and 31,930,904.80

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Solution

The fourth proportional to 72,871,544.80, 109,291,570.80 and 31,930,904.80 is: 47,889,457.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,871,544.80 : 109,291,570.80 = 31,930,904.80 : x
  2. Step 2: Convert to fraction form
    72,871,544.80/109,291,570.80 = 31,930,904.80/x
  3. Step 3: Cross multiply
    72,871,544.80x = 109,291,570.80 × 31,930,904.80
  4. Step 4: Simplify right side
    72,871,544.80x = 3,489,778,742,657,260
  5. Step 5: Solve for x
    x = 3,489,778,742,657,260/72,871,544.80
  6. Step 6: Final answer
    x = 47,889,457.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.