Home / 84,985,871.80-127,478,807.70-77,899,991.80

Finding the Fourth Proportional to 84,985,871.80, 127,478,807.70 and 77,899,991.80

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Solution

The fourth proportional to 84,985,871.80, 127,478,807.70 and 77,899,991.80 is: 116,849,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,985,871.80 : 127,478,807.70 = 77,899,991.80 : x
  2. Step 2: Convert to fraction form
    84,985,871.80/127,478,807.70 = 77,899,991.80/x
  3. Step 3: Cross multiply
    84,985,871.80x = 127,478,807.70 × 77,899,991.80
  4. Step 4: Simplify right side
    84,985,871.80x = 9,930,598,074,503,776
  5. Step 5: Solve for x
    x = 9,930,598,074,503,776/84,985,871.80
  6. Step 6: Final answer
    x = 116,849,987.70

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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.