Home / 85,826,220.80-128,739,331.20-76,472,859.20

Finding the Fourth Proportional to 85,826,220.80, 128,739,331.20 and 76,472,859.20

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Solution

The fourth proportional to 85,826,220.80, 128,739,331.20 and 76,472,859.20 is: 114,709,288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,826,220.80 : 128,739,331.20 = 76,472,859.20 : x
  2. Step 2: Convert to fraction form
    85,826,220.80/128,739,331.20 = 76,472,859.20/x
  3. Step 3: Cross multiply
    85,826,220.80x = 128,739,331.20 × 76,472,859.20
  4. Step 4: Simplify right side
    85,826,220.80x = 9,845,064,748,359,768
  5. Step 5: Solve for x
    x = 9,845,064,748,359,768/85,826,220.80
  6. Step 6: Final answer
    x = 114,709,288.80

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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.