Home / 85,968,313.70-128,952,470.55-55,357,312.10

Finding the Fourth Proportional to 85,968,313.70, 128,952,470.55 and 55,357,312.10

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Solution

The fourth proportional to 85,968,313.70, 128,952,470.55 and 55,357,312.10 is: 83,035,968.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968,313.70 : 128,952,470.55 = 55,357,312.10 : x
  2. Step 2: Convert to fraction form
    85,968,313.70/128,952,470.55 = 55,357,312.10/x
  3. Step 3: Cross multiply
    85,968,313.70x = 128,952,470.55 × 55,357,312.10
  4. Step 4: Simplify right side
    85,968,313.70x = 7,138,462,158,302,409
  5. Step 5: Solve for x
    x = 7,138,462,158,302,409/85,968,313.70
  6. Step 6: Final answer
    x = 83,035,968.15

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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.