Home / 82,380,101.40-123,570,152.10-78,600,965.40

Finding the Fourth Proportional to 82,380,101.40, 123,570,152.10 and 78,600,965.40

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Solution

The fourth proportional to 82,380,101.40, 123,570,152.10 and 78,600,965.40 is: 117,901,448.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,380,101.40 : 123,570,152.10 = 78,600,965.40 : x
  2. Step 2: Convert to fraction form
    82,380,101.40/123,570,152.10 = 78,600,965.40/x
  3. Step 3: Cross multiply
    82,380,101.40x = 123,570,152.10 × 78,600,965.40
  4. Step 4: Simplify right side
    82,380,101.40x = 9,712,733,249,684,838
  5. Step 5: Solve for x
    x = 9,712,733,249,684,838/82,380,101.40
  6. Step 6: Final answer
    x = 117,901,448.10

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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.