Home / 72,009,403-99,373,909.26-39,413,655.16

Finding the Fourth Proportional to 72,009,403, 99,373,909.26 and 39,413,655.16

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Solution

The fourth proportional to 72,009,403, 99,373,909.26 and 39,413,655.16 is: 54,391,354.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,009,403 : 99,373,909.26 = 39,413,655.16 : x
  2. Step 2: Convert to fraction form
    72,009,403/99,373,909.26 = 39,413,655.16/x
  3. Step 3: Cross multiply
    72,009,403x = 99,373,909.26 × 39,413,655.16
  4. Step 4: Simplify right side
    72,009,403x = 3,916,688,991,474,770.50
  5. Step 5: Solve for x
    x = 3,916,688,991,474,770.50/72,009,403
  6. Step 6: Final answer
    x = 54,391,354.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.