Home / 85,931,290.80-128,896,936.20-82,572,058.80

Finding the Fourth Proportional to 85,931,290.80, 128,896,936.20 and 82,572,058.80

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Solution

The fourth proportional to 85,931,290.80, 128,896,936.20 and 82,572,058.80 is: 123,858,088.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,931,290.80 : 128,896,936.20 = 82,572,058.80 : x
  2. Step 2: Convert to fraction form
    85,931,290.80/128,896,936.20 = 82,572,058.80/x
  3. Step 3: Cross multiply
    85,931,290.80x = 128,896,936.20 × 82,572,058.80
  4. Step 4: Simplify right side
    85,931,290.80x = 10,643,285,395,046,248
  5. Step 5: Solve for x
    x = 10,643,285,395,046,248/85,931,290.80
  6. Step 6: Final answer
    x = 123,858,088.20

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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.