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Finding the Fourth Proportional to 64,516,821.60, 96,773,158.80 and 21,388,015.20

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Solution

The fourth proportional to 64,516,821.60, 96,773,158.80 and 21,388,015.20 is: 32,081,335.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,516,821.60 : 96,773,158.80 = 21,388,015.20 : x
  2. Step 2: Convert to fraction form
    64,516,821.60/96,773,158.80 = 21,388,015.20/x
  3. Step 3: Cross multiply
    64,516,821.60x = 96,773,158.80 × 21,388,015.20
  4. Step 4: Simplify right side
    64,516,821.60x = 2,069,785,791,366,413.50
  5. Step 5: Solve for x
    x = 2,069,785,791,366,413.50/64,516,821.60
  6. Step 6: Final answer
    x = 32,081,335.38

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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.