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Finding the Fourth Proportional to 230,547.34, 318,154.71 and 128,572.92

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Solution

The fourth proportional to 230,547.34, 318,154.71 and 128,572.92 is: 177,430.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,547.34 : 318,154.71 = 128,572.92 : x
  2. Step 2: Convert to fraction form
    230,547.34/318,154.71 = 128,572.92/x
  3. Step 3: Cross multiply
    230,547.34x = 318,154.71 × 128,572.92
  4. Step 4: Simplify right side
    230,547.34x = 40,906,080,196.99
  5. Step 5: Solve for x
    x = 40,906,080,196.99/230,547.34
  6. Step 6: Final answer
    x = 177,430.29

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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.