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Finding the Fourth Proportional to 145,396.77, 218,130.01 and 70,429.29

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Solution

The fourth proportional to 145,396.77, 218,130.01 and 70,429.29 is: 105,660.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,396.77 : 218,130.01 = 70,429.29 : x
  2. Step 2: Convert to fraction form
    145,396.77/218,130.01 = 70,429.29/x
  3. Step 3: Cross multiply
    145,396.77x = 218,130.01 × 70,429.29
  4. Step 4: Simplify right side
    145,396.77x = 15,362,742,373.91
  5. Step 5: Solve for x
    x = 15,362,742,373.91/145,396.77
  6. Step 6: Final answer
    x = 105,660.82

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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.