Home / 89,012,106.40-122,769,158.40-77,979,702.88

Finding the Fourth Proportional to 89,012,106.40, 122,769,158.40 and 77,979,702.88

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Solution

The fourth proportional to 89,012,106.40, 122,769,158.40 and 77,979,702.88 is: 107,552,813.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,012,106.40 : 122,769,158.40 = 77,979,702.88 : x
  2. Step 2: Convert to fraction form
    89,012,106.40/122,769,158.40 = 77,979,702.88/x
  3. Step 3: Cross multiply
    89,012,106.40x = 122,769,158.40 × 77,979,702.88
  4. Step 4: Simplify right side
    89,012,106.40x = 9,573,502,494,859,656
  5. Step 5: Solve for x
    x = 9,573,502,494,859,656/89,012,106.40
  6. Step 6: Final answer
    x = 107,552,813.68

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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.