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Finding the Fourth Proportional to 157,430.46, 217,216.70 and 89,448.78

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Solution

The fourth proportional to 157,430.46, 217,216.70 and 89,448.78 is: 123,418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,430.46 : 217,216.70 = 89,448.78 : x
  2. Step 2: Convert to fraction form
    157,430.46/217,216.70 = 89,448.78/x
  3. Step 3: Cross multiply
    157,430.46x = 217,216.70 × 89,448.78
  4. Step 4: Simplify right side
    157,430.46x = 19,429,768,810.63
  5. Step 5: Solve for x
    x = 19,429,768,810.63/157,430.46
  6. Step 6: Final answer
    x = 123,418.10

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1.5x scale

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.