Home / 145,557.10-218,261.80-66,603.66

Finding the Fourth Proportional to 145,557.10, 218,261.80 and 66,603.66

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Solution

The fourth proportional to 145,557.10, 218,261.80 and 66,603.66 is: 99,871.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,557.10 : 218,261.80 = 66,603.66 : x
  2. Step 2: Convert to fraction form
    145,557.10/218,261.80 = 66,603.66/x
  3. Step 3: Cross multiply
    145,557.10x = 218,261.80 × 66,603.66
  4. Step 4: Simplify right side
    145,557.10x = 14,537,034,718.19
  5. Step 5: Solve for x
    x = 14,537,034,718.19/145,557.10
  6. Step 6: Final answer
    x = 99,871.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.