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Finding the Fourth Proportional to 85,868,605.60, 128,758,585.20 and 25,276,458.40

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Solution

The fourth proportional to 85,868,605.60, 128,758,585.20 and 25,276,458.40 is: 37,901,640.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,868,605.60 : 128,758,585.20 = 25,276,458.40 : x
  2. Step 2: Convert to fraction form
    85,868,605.60/128,758,585.20 = 25,276,458.40/x
  3. Step 3: Cross multiply
    85,868,605.60x = 128,758,585.20 × 25,276,458.40
  4. Step 4: Simplify right side
    85,868,605.60x = 3,254,561,022,450,655.50
  5. Step 5: Solve for x
    x = 3,254,561,022,450,655.50/85,868,605.60
  6. Step 6: Final answer
    x = 37,901,640.53

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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.