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Finding the Fourth Proportional to 86,896,671.40, 130,345,007.10 and 85,552,978.60

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Solution

The fourth proportional to 86,896,671.40, 130,345,007.10 and 85,552,978.60 is: 128,329,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,896,671.40 : 130,345,007.10 = 85,552,978.60 : x
  2. Step 2: Convert to fraction form
    86,896,671.40/130,345,007.10 = 85,552,978.60/x
  3. Step 3: Cross multiply
    86,896,671.40x = 130,345,007.10 × 85,552,978.60
  4. Step 4: Simplify right side
    86,896,671.40x = 11,151,403,603,043,146
  5. Step 5: Solve for x
    x = 11,151,403,603,043,146/86,896,671.40
  6. Step 6: Final answer
    x = 128,329,467.90

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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.