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Finding the Fourth Proportional to 77,688,460.80, 108,562,291.20 and 77,688,460.80

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Solution

The fourth proportional to 77,688,460.80, 108,562,291.20 and 77,688,460.80 is: 108,562,291.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,688,460.80 : 108,562,291.20 = 77,688,460.80 : x
  2. Step 2: Convert to fraction form
    77,688,460.80/108,562,291.20 = 77,688,460.80/x
  3. Step 3: Cross multiply
    77,688,460.80x = 108,562,291.20 × 77,688,460.80
  4. Step 4: Simplify right side
    77,688,460.80x = 8,434,037,304,249,385
  5. Step 5: Solve for x
    x = 8,434,037,304,249,385/77,688,460.80
  6. Step 6: Final answer
    x = 108,562,291.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.