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Finding the Fourth Proportional to 145,335,979.20, 218,045,959.20 and 43,102,477.20

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Solution

The fourth proportional to 145,335,979.20, 218,045,959.20 and 43,102,477.20 is: 64,666,168.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,335,979.20 : 218,045,959.20 = 43,102,477.20 : x
  2. Step 2: Convert to fraction form
    145,335,979.20/218,045,959.20 = 43,102,477.20/x
  3. Step 3: Cross multiply
    145,335,979.20x = 218,045,959.20 × 43,102,477.20
  4. Step 4: Simplify right side
    145,335,979.20x = 9,398,320,984,970,130
  5. Step 5: Solve for x
    x = 9,398,320,984,970,130/145,335,979.20
  6. Step 6: Final answer
    x = 64,666,168.95

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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.