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Finding the Fourth Proportional to 34,681,155.75, 47,859,978.28 and 20,742,510.61

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Solution

The fourth proportional to 34,681,155.75, 47,859,978.28 and 20,742,510.61 is: 28,624,654.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,681,155.75 : 47,859,978.28 = 20,742,510.61 : x
  2. Step 2: Convert to fraction form
    34,681,155.75/47,859,978.28 = 20,742,510.61/x
  3. Step 3: Cross multiply
    34,681,155.75x = 47,859,978.28 × 20,742,510.61
  4. Step 4: Simplify right side
    34,681,155.75x = 992,736,107,027,969.75
  5. Step 5: Solve for x
    x = 992,736,107,027,969.75/34,681,155.75
  6. Step 6: Final answer
    x = 28,624,654.68

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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.