Home / 145,038.52-217,644.05-78,477.31

Finding the Fourth Proportional to 145,038.52, 217,644.05 and 78,477.31

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Solution

The fourth proportional to 145,038.52, 217,644.05 and 78,477.31 is: 117,762.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,038.52 : 217,644.05 = 78,477.31 : x
  2. Step 2: Convert to fraction form
    145,038.52/217,644.05 = 78,477.31/x
  3. Step 3: Cross multiply
    145,038.52x = 217,644.05 × 78,477.31
  4. Step 4: Simplify right side
    145,038.52x = 17,080,119,581.51
  5. Step 5: Solve for x
    x = 17,080,119,581.51/145,038.52
  6. Step 6: Final answer
    x = 117,762.64

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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.