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Finding the Fourth Proportional to 152,671.13, 210,689.54 and 84,685.89

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Solution

The fourth proportional to 152,671.13, 210,689.54 and 84,685.89 is: 116,868.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,671.13 : 210,689.54 = 84,685.89 : x
  2. Step 2: Convert to fraction form
    152,671.13/210,689.54 = 84,685.89/x
  3. Step 3: Cross multiply
    152,671.13x = 210,689.54 × 84,685.89
  4. Step 4: Simplify right side
    152,671.13x = 17,842,429,731.71
  5. Step 5: Solve for x
    x = 17,842,429,731.71/152,671.13
  6. Step 6: Final answer
    x = 116,868.39

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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.