Home / 85,968,605.20-128,952,907.80-55,357,603.60

Finding the Fourth Proportional to 85,968,605.20, 128,952,907.80 and 55,357,603.60

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Solution

The fourth proportional to 85,968,605.20, 128,952,907.80 and 55,357,603.60 is: 83,036,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968,605.20 : 128,952,907.80 = 55,357,603.60 : x
  2. Step 2: Convert to fraction form
    85,968,605.20/128,952,907.80 = 55,357,603.60/x
  3. Step 3: Cross multiply
    85,968,605.20x = 128,952,907.80 × 55,357,603.60
  4. Step 4: Simplify right side
    85,968,605.20x = 7,138,523,953,059,748
  5. Step 5: Solve for x
    x = 7,138,523,953,059,748/85,968,605.20
  6. Step 6: Final answer
    x = 83,036,405.40

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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.