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Finding the Fourth Proportional to 115,421, 159,280.98 and 62,429

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Solution

The fourth proportional to 115,421, 159,280.98 and 62,429 is: 86,152.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,421 : 159,280.98 = 62,429 : x
  2. Step 2: Convert to fraction form
    115,421/159,280.98 = 62,429/x
  3. Step 3: Cross multiply
    115,421x = 159,280.98 × 62,429
  4. Step 4: Simplify right side
    115,421x = 9,943,752,300.42
  5. Step 5: Solve for x
    x = 9,943,752,300.42/115,421
  6. Step 6: Final answer
    x = 86,152.02

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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.