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Finding the Fourth Proportional to 157,392, 217,210.08 and 90,328.32

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Solution

The fourth proportional to 157,392, 217,210.08 and 90,328.32 is: 124,658.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,392 : 217,210.08 = 90,328.32 : x
  2. Step 2: Convert to fraction form
    157,392/217,210.08 = 90,328.32/x
  3. Step 3: Cross multiply
    157,392x = 217,210.08 × 90,328.32
  4. Step 4: Simplify right side
    157,392x = 19,620,221,613.47
  5. Step 5: Solve for x
    x = 19,620,221,613.47/157,392
  6. Step 6: Final answer
    x = 124,658.32

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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.