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Finding the Fourth Proportional to 72,703,651.60, 108,962,856.60 and 38,641,315.60

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Solution

The fourth proportional to 72,703,651.60, 108,962,856.60 and 38,641,315.60 is: 57,912,746.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,703,651.60 : 108,962,856.60 = 38,641,315.60 : x
  2. Step 2: Convert to fraction form
    72,703,651.60/108,962,856.60 = 38,641,315.60/x
  3. Step 3: Cross multiply
    72,703,651.60x = 108,962,856.60 × 38,641,315.60
  4. Step 4: Simplify right side
    72,703,651.60x = 4,210,468,130,558,143
  5. Step 5: Solve for x
    x = 4,210,468,130,558,143/72,703,651.60
  6. Step 6: Final answer
    x = 57,912,746.31

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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.