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Finding the Fourth Proportional to 72,609,760.88, 100,203,569.88 and 40,016,812.40

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Solution

The fourth proportional to 72,609,760.88, 100,203,569.88 and 40,016,812.40 is: 55,224,358.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,609,760.88 : 100,203,569.88 = 40,016,812.40 : x
  2. Step 2: Convert to fraction form
    72,609,760.88/100,203,569.88 = 40,016,812.40/x
  3. Step 3: Cross multiply
    72,609,760.88x = 100,203,569.88 × 40,016,812.40
  4. Step 4: Simplify right side
    72,609,760.88x = 4,009,827,457,698,250
  5. Step 5: Solve for x
    x = 4,009,827,457,698,250/72,609,760.88
  6. Step 6: Final answer
    x = 55,224,358.39

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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.