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Finding the Fourth Proportional to 105,762.45, 145,901.88 and 63,312.78

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Solution

The fourth proportional to 105,762.45, 145,901.88 and 63,312.78 is: 87,341.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,762.45 : 145,901.88 = 63,312.78 : x
  2. Step 2: Convert to fraction form
    105,762.45/145,901.88 = 63,312.78/x
  3. Step 3: Cross multiply
    105,762.45x = 145,901.88 × 63,312.78
  4. Step 4: Simplify right side
    105,762.45x = 9,237,453,630.03
  5. Step 5: Solve for x
    x = 9,237,453,630.03/105,762.45
  6. Step 6: Final answer
    x = 87,341.52

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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.