Home / 85,698,003.30-128,547,004.95-81,446,475.30

Finding the Fourth Proportional to 85,698,003.30, 128,547,004.95 and 81,446,475.30

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Solution

The fourth proportional to 85,698,003.30, 128,547,004.95 and 81,446,475.30 is: 122,169,712.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,698,003.30 : 128,547,004.95 = 81,446,475.30 : x
  2. Step 2: Convert to fraction form
    85,698,003.30/128,547,004.95 = 81,446,475.30/x
  3. Step 3: Cross multiply
    85,698,003.30x = 128,547,004.95 × 81,446,475.30
  4. Step 4: Simplify right side
    85,698,003.30x = 10,469,700,463,549,152
  5. Step 5: Solve for x
    x = 10,469,700,463,549,152/85,698,003.30
  6. Step 6: Final answer
    x = 122,169,712.95

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1.5x scale

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.