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Finding the Fourth Proportional to 85,373,978.80, 128,041,801.80 and 39,271,570.48

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Solution

The fourth proportional to 85,373,978.80, 128,041,801.80 and 39,271,570.48 is: 58,898,539.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,373,978.80 : 128,041,801.80 = 39,271,570.48 : x
  2. Step 2: Convert to fraction form
    85,373,978.80/128,041,801.80 = 39,271,570.48/x
  3. Step 3: Cross multiply
    85,373,978.80x = 128,041,801.80 × 39,271,570.48
  4. Step 4: Simplify right side
    85,373,978.80x = 5,028,402,643,774,890
  5. Step 5: Solve for x
    x = 5,028,402,643,774,890/85,373,978.80
  6. Step 6: Final answer
    x = 58,898,539.28

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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.