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Finding the Fourth Proportional to 91,651,868.10, 137,477,802.15 and 81,448,200.90

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Solution

The fourth proportional to 91,651,868.10, 137,477,802.15 and 81,448,200.90 is: 122,172,301.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,651,868.10 : 137,477,802.15 = 81,448,200.90 : x
  2. Step 2: Convert to fraction form
    91,651,868.10/137,477,802.15 = 81,448,200.90/x
  3. Step 3: Cross multiply
    91,651,868.10x = 137,477,802.15 × 81,448,200.90
  4. Step 4: Simplify right side
    91,651,868.10x = 11,197,319,648,803,654
  5. Step 5: Solve for x
    x = 11,197,319,648,803,654/91,651,868.10
  6. Step 6: Final answer
    x = 122,172,301.35

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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.