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Finding the Fourth Proportional to 93,210.40, 128,636.40 and 55,479.52

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Solution

The fourth proportional to 93,210.40, 128,636.40 and 55,479.52 is: 76,565.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,210.40 : 128,636.40 = 55,479.52 : x
  2. Step 2: Convert to fraction form
    93,210.40/128,636.40 = 55,479.52/x
  3. Step 3: Cross multiply
    93,210.40x = 128,636.40 × 55,479.52
  4. Step 4: Simplify right side
    93,210.40x = 7,136,685,726.53
  5. Step 5: Solve for x
    x = 7,136,685,726.53/93,210.40
  6. Step 6: Final answer
    x = 76,565.34

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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.