Home / 257,871,713.40-386,807,570.10-85,365,964.80

Finding the Fourth Proportional to 257,871,713.40, 386,807,570.10 and 85,365,964.80

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Solution

The fourth proportional to 257,871,713.40, 386,807,570.10 and 85,365,964.80 is: 128,048,947.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,871,713.40 : 386,807,570.10 = 85,365,964.80 : x
  2. Step 2: Convert to fraction form
    257,871,713.40/386,807,570.10 = 85,365,964.80/x
  3. Step 3: Cross multiply
    257,871,713.40x = 386,807,570.10 × 85,365,964.80
  4. Step 4: Simplify right side
    257,871,713.40x = 33,020,201,413,530,132
  5. Step 5: Solve for x
    x = 33,020,201,413,530,132/257,871,713.40
  6. Step 6: Final answer
    x = 128,048,947.20

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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.