Home / 85,406,788.01-128,056,349-72,457,473.53

Finding the Fourth Proportional to 85,406,788.01, 128,056,349 and 72,457,473.53

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Solution

The fourth proportional to 85,406,788.01, 128,056,349 and 72,457,473.53 is: 108,640,539.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406,788.01 : 128,056,349 = 72,457,473.53 : x
  2. Step 2: Convert to fraction form
    85,406,788.01/128,056,349 = 72,457,473.53/x
  3. Step 3: Cross multiply
    85,406,788.01x = 128,056,349 × 72,457,473.53
  4. Step 4: Simplify right side
    85,406,788.01x = 9,278,639,518,015,942
  5. Step 5: Solve for x
    x = 9,278,639,518,015,942/85,406,788.01
  6. Step 6: Final answer
    x = 108,640,539.40

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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.