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Finding the Fourth Proportional to 145,878.60, 201,312.42 and 78,810.60

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Solution

The fourth proportional to 145,878.60, 201,312.42 and 78,810.60 is: 108,758.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,878.60 : 201,312.42 = 78,810.60 : x
  2. Step 2: Convert to fraction form
    145,878.60/201,312.42 = 78,810.60/x
  3. Step 3: Cross multiply
    145,878.60x = 201,312.42 × 78,810.60
  4. Step 4: Simplify right side
    145,878.60x = 15,865,552,607.65
  5. Step 5: Solve for x
    x = 15,865,552,607.65/145,878.60
  6. Step 6: Final answer
    x = 108,758.60

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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.