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Finding the Fourth Proportional to 124,689,991.60, 187,034,987.40 and 38,420,714.80

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Solution

The fourth proportional to 124,689,991.60, 187,034,987.40 and 38,420,714.80 is: 57,631,072.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,689,991.60 : 187,034,987.40 = 38,420,714.80 : x
  2. Step 2: Convert to fraction form
    124,689,991.60/187,034,987.40 = 38,420,714.80/x
  3. Step 3: Cross multiply
    124,689,991.60x = 187,034,987.40 × 38,420,714.80
  4. Step 4: Simplify right side
    124,689,991.60x = 7,186,017,908,516,993
  5. Step 5: Solve for x
    x = 7,186,017,908,516,993/124,689,991.60
  6. Step 6: Final answer
    x = 57,631,072.20

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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.