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Finding the Fourth Proportional to 72,154.90, 99,509.29 and 45,299.91

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Solution

The fourth proportional to 72,154.90, 99,509.29 and 45,299.91 is: 62,473.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,154.90 : 99,509.29 = 45,299.91 : x
  2. Step 2: Convert to fraction form
    72,154.90/99,509.29 = 45,299.91/x
  3. Step 3: Cross multiply
    72,154.90x = 99,509.29 × 45,299.91
  4. Step 4: Simplify right side
    72,154.90x = 4,507,761,881.16
  5. Step 5: Solve for x
    x = 4,507,761,881.16/72,154.90
  6. Step 6: Final answer
    x = 62,473.40

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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.