Home / 85,406,502.20-128,109,753.30-81,438,409.40

Finding the Fourth Proportional to 85,406,502.20, 128,109,753.30 and 81,438,409.40

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Solution

The fourth proportional to 85,406,502.20, 128,109,753.30 and 81,438,409.40 is: 122,157,614.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406,502.20 : 128,109,753.30 = 81,438,409.40 : x
  2. Step 2: Convert to fraction form
    85,406,502.20/128,109,753.30 = 81,438,409.40/x
  3. Step 3: Cross multiply
    85,406,502.20x = 128,109,753.30 × 81,438,409.40
  4. Step 4: Simplify right side
    85,406,502.20x = 10,433,054,537,378,402
  5. Step 5: Solve for x
    x = 10,433,054,537,378,402/85,406,502.20
  6. Step 6: Final answer
    x = 122,157,614.10

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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.