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Finding the Fourth Proportional to 65,243,807.51, 90,039,686.40 and 40,471,975.82

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Solution

The fourth proportional to 65,243,807.51, 90,039,686.40 and 40,471,975.82 is: 55,853,331.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,243,807.51 : 90,039,686.40 = 40,471,975.82 : x
  2. Step 2: Convert to fraction form
    65,243,807.51/90,039,686.40 = 40,471,975.82/x
  3. Step 3: Cross multiply
    65,243,807.51x = 90,039,686.40 × 40,471,975.82
  4. Step 4: Simplify right side
    65,243,807.51x = 3,644,084,011,046,282
  5. Step 5: Solve for x
    x = 3,644,084,011,046,282/65,243,807.51
  6. Step 6: Final answer
    x = 55,853,331.53

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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.